SoCal and I've been running Rotella T6 with no loss in oil presssure. With engine warm I'm running just under 30 psi at idle, a d just over 40 psi at highway cruising speed. Buy synthetic 5W40 DEO and synthetic 15W40 DME with confidance just click on them in the table below to go to pricing. Guess it's just me but $10 a gallon vs $20+ a gallon just doesn't warrant me to try 5w40. Either one. Pick a good oil you trust and use good filters. /ubbthreads/images/graemlins/grin.gif. Looking for diesel oil? JavaScript is disabled. 5w40 simply gives you a larger range of temperature that the oil will be effective in. Read on. Liqui Moly 2041 Premium 5W-40 Synthetic Motor Oil; 4. *Compared to 15W-40 oils. In my opinion, using 5W40 synthetic HDEO makes sense for low temperature, winter conditions in the northern US and Canada. Then there are people who's truck will not hardly run anything but 5w40. Olio VS MAX 15W40 1 litro. For a better experience, please enable JavaScript in your browser before proceeding. Liqui Moly 2041 Premium 5W-40 Synthetic Motor Oil; 4. Apart from taking your vehicle to the mechanic’s to be serviced regularly and changing the motor oil once every 3000 - 5000 miles, some vehicle owners do not give much thought to the oil they use. There are people who run 15w40 all the time and have no trouble. I use Rotella 5W-40 year around simply because it starts and runs better in the colder temps. 10w40 vs 5w40 which one is better for your Car? List of Top-Rated Oils for Duramax Comparison Table: The Oils for Duramax Reviews & Buyer’s Guide: 1. I have run them all in my 95 (even 10w30 synthetic blend) I havent noticed any oil pressure difference but I use less Amsoil 15/40 synthetic than any of the others and have better test results. Mobil 1 96989 0W-40 Synthetic Motor Oil; 3. Viscosity Test Here is a little test I did comparing two diesel motor oils to see the flow of oil on a cold start in winter. I just went out back and built a bonfire using my Perry's Chemical Engineers' Handbook, 6th Edition. This is because the 5w30 motor oil has a smooth effect on the oil pump and also a more suitable flow through the engine when hot. I also upgraded to a larger Donaldson filter. The "40" indicates this is a bit thicker than the average motor oil, which is usually 30 for most cars, and it lubricates the engine more than average while it is hot. Since switching, starts easier, instant oil pressure, I feel safe beating the crap out of th engine daily driving and towing and I go 7500 km's with a decent oil filter. Överst. 2014-06-08 18:30 #2. a128. 5W30 vs 5W40 : Which Oil Should I Choose? To ensure maximum durability for your engines, Red Line 21405 diesel oil has that capability. I've used all kinds of oil, and found full synthetic 0-40 the best for me. The manual calls for 15w40. Improved Wear Performance. Welcome! Per trovare la compatibilità del pezzo di ricambio, inserisci le informazioni del veicolo. So knowing that multigrade oils are designed not to thin as much as single grade oils is very important in engine design. Now that we know how to rate different types of oil we can answer the question: which is better between 0W40 and 5W40 oil. Differences between 5w40 vs. 5w50 motor oil. I see that 15W-40 oil is suggested for this engine. Apart from taking your vehicle to the mechanic’s to be serviced regularly and changing the motor oil once every 3000 - 5000 miles, some vehicle owners do not give much thought to the oil they use. Not my pic, just reference. diesel oil for the 2007 and newer , and two weights for your 6.6 duramax diesel oil for 2006 and older. Wondering if any of the collective has used the 5W40 T6 and tried the 15W40 T6 and … Family, you are now pretty close, and I wouldn't argue with "all of the above". I see Shell makes a 5w40 full synthetic as well as Mobil 1. 2005 F250 Harley Davidson 6.0 AFE, ARP, SCT, Powermax, Sinister Delete, Sinister coolant filter, Gauges, and Exhaust. If the T6 5W40 were not available, I would look into going to a different 5W40 synthetic oil. Old thread but synthetic Rotella 5w40 all the way. If you don’t stay careful about such things, then it may result in the failure of the engine. Read More » When it comes to choosing between 5w30 and 5w40, many people prefer the former. Actually, the 5 in 5-40 means that the oil flows the same as an oil with an SSU viscosity of 5 at 100 degrees F, and the 40 means that the oil behaves the same at 210 degrees as 40 weight oil. Our team of experts narrowed down the best diesel oils on the market. On another note, the Duramax runs fine on API approved 15W40 conventional heavy-duty diesel oil. Better Fuel Economy. Google the difference in moleculer chain shapes and structure to see why that happens, no fix oil wise just throw in the gasket and keep going. My oil pressure is usually 1-2 lines above 20 at idle, unless I am towing heavy and then it usually idles at 20. I use Amsoil or K@N filters. Whether you’re looking to upgrade your comfort, style, or accessibility, we have picks to fit a variety of needs and budgets. Can I safely use the 5w40? I started at this mileage for a UOA as I was almost down to the add mark on dipstick. Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6; ... and Lotus recommends a 5W40 weight. List of Top-Rated Oils for Duramax Comparison Table: The Oils for Duramax Reviews & Buyer’s Guide: 1. However, it rarely gets above the high 70s to low 80s here. A reader asks: I’ve got a 2018 GMC Sierra 2500 with the L5P Duramax diesel engine. Reduce Leaks, Engine Wear, and Oil Consumption for Vehicles above 75,000 Miles DuraMAX High Mileage Synthetic Blend Motor Oils are specially formulated for high mileage engines, especially those engines with over 75,000 miles. Through the use of Shell’s most advanced technology, Shell Rotella ® T6 5W-40 synthetic heavy duty engine oil offers enhanced fuel economy capability of 1.5%* that can save money in fuel consumption, without compromising engine protection or durability. The 5W40 is thinner than the 10W40 at lower temperatures. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. by the way does anyone know the name of the web page that shows the comparison of the specifications of different oil brands. You should have no problems with it. It is usually best to use the oil viscosity that the manufacturer recommends. On our 6.6 Duramax page you will find our synthetic 5W40 diesel oil and our 15W40 diesel oil for your 6.6 duramax. The duramax motors arent picky on oil. Better Fuel Economy. #16 GasperG , May 20, 2014 When it comes to choosing between 5w30 and 5w40, many people prefer the former. If they recommend 10–40, then use 10–40. skillnad på 5w40 och 15w40 . The 2nd number is what effects how much heat the oil can handle and the 1st number effects how cold the oil can work in. If you switch from conventional to synthetic expect oil leaks sooner. Thanks for the info Ken. It Makes Your Engine Last Longer. I ran synthetic 15w40 in my truck until I reached 33,000 miles. thanks for the help. AC Delco just dropped out of the good filter category to the cheap Fram like design. 5W40 vs 10W40 – Differences. For the price of synthetic vs dino oil and the fact I go longer, add on better engine protection etc, its a winner for me. An island in south west pacific, cl. Ever seen 15w40 dino oil at sub zero temps, its like molasses, compare it to synthetic 5w40, that's why it takes time for the oil pressure to move. If synthetic from beginning no problems at all. Best 15w40 diesel oil of 2018. Your engine clatters longer filling the oil filter back up. 5W30 vs 5W40 : Which Oil Should I Choose? Improved Wear Performance. I ran synthetic 15w40 in my truck until I reached 33,000 miles. My last oil change I switched to Shell Rotella Syntehtic 5w40. Can I use 5W-40 in the winter? Approved or Recommended for applications where Cummins CES 20086, Mack EOS-4.5, Volvo VDS-4.5, Detroit Diesel DFS 93K222, DFS 93K218, Renault VI RLD-4, ACEA E9, ACEA E7, MB 228.31, Ford WSS-M2C171-F1, Caterpillar ECF-3, or Chrysler MS-10902 are specified Come join the discussion about PowerStrokes, performance, modifications, troubleshooting, towing capacity, maintenance, and more! Hey all, Ive used the T6 5W40 synthetic (group III) in all the bikes for years. Nessun veicolo selezionato. Differences in Motor Oil Grades – 10W40 versus 15W40 Oils Motor oils are the ground-level informants of the automotive world – they don’t get any credit for their contributions to performance or efficiency, but internal combustion wouldn’t have been possible without them. 2005 F250 Harley Davidson 6.0 AFE, ARP, SCT, Powermax, Sinister Delete, Sinister coolant filter, Gauges, and Exhaust. I have used mobile 1 turbo diesel since new. what are the benifits/drawbacks of using a 5w-40 rather than a 15w-40? I have used mobile 1 turbo diesel since new. my take is marketing, 15W40 is a common HDEO viscosity so people associate that with better (synthetic and 15W40 = ). When the oil heat up, it should be the same pressure. I am under legal order to not say why, but I don't run it. I use it year round and change oil every 15 thousand miles or so. Filed Under: Diesel Tagged With: amsoil 10w30 diesel oil, amsoil 15w40 amazon, amsoil 15w40 diesel oil review, amsoil 15w40 duramax, amsoil 5w40 diesel oil, amsoil diesel oil amazon, amsoil diesel oil vs shell rotella, amsoil oe 15w-40 synthetic diesel oil, amsoil oil ca, amsoil signature series max-duty synthetic diesel oil 15w-40 Turning to more recent years, PETRONAS brings to light the VS brand, one of the best sold in the 70s, whose fame is historically linked to the Fiat 131 Abarth, winner of the Manufacturers' title in 3 World Rally Championships. F. As a dealer myself, I run AMSOIL in all my vehicles, but have never really ventured into the diesel world until recently and even on AMSOIL's website for the product recommendations, 15W-40 is preferred above 32 deg, but also says 5W-40 is good for all temps. Well, for a start, we can see that they have the same viscosity when heated to normal engine operating temperatures so that won’t set them apart. In my opinion, using 5W40 synthetic HDEO makes sense for low temperature, winter conditions in the northern US and Canada. I see the 5W40 less and the 15W40 more. Mobil 1™ Turbo Diesel Truck 5W-40 is a fully synthetic performance heavy duty diesel engine oil that helps to extend engine life while providing long drain capability and fuel economy for modern diesel engines operating in severe applications. Again I am.guessing that it would stay cleaner longer but in have no idea as I have ZERO experience with the regular vs synthetics in the diesels. Silicone valves like Wix and Mobile 1 are the way to go. I was thinking of using mobil devac 1 on my next oil change. I picked up the Shell rotella 15w40 synthetic blend to do an oil change today. Amsoil is about no compromises and saving you time. I really depends upon where you live. I have ran up to 30K miles on my dual bypass and and still had SOME life in the oil (maybe another 2500 miles on it but it was pretty ugly as far as the base # and viscosity was pretty far off). Överst. It's worth it and I think im sticking to it year round. The 5 means that the oil will flow at zero celsius the same way a 5-weight oil would. It’s suitable for medium and heavy-duty diesel truck engines. JavaScript is disabled. 2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. Extended Performance 5W … Find the right Shell Lubricant for you based on your vehicle or equipment. Then there are people who's truck will not hardly run anything but 5w40. Filed Under: Diesel Tagged With: amsoil 10w30 diesel oil, amsoil 15w40 amazon, amsoil 15w40 diesel oil review, amsoil 15w40 duramax, amsoil 5w40 diesel oil, amsoil diesel oil amazon, amsoil diesel oil vs shell rotella, amsoil oe 15w-40 synthetic diesel oil, amsoil oil ca, amsoil signature series max-duty synthetic diesel oil 15w-40 I change the oil for my dad according to the oil life monitoring system. Not my pic, just reference. Reason for asking is that I'm due for an oil change and I can get a gallon of Rotella 15w40 for $12.50. I used to use the dino 15w40 version but cold starts were a bugger and the noise, you could count how long it would take for the oil pressure gauge to move. Approved or Recommended for applications where Cummins CES 20086, Mack EOS-4.5, Volvo VDS-4.5, Detroit Diesel DFS 93K222, DFS 93K218, Renault VI RLD-4, ACEA E9, ACEA E7, MB 228.31, Ford WSS-M2C171-F1, Caterpillar ECF-3, or Chrysler MS-10902 are specified The truck runs much better and starts alot faster with smoother idle. Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6; ... and Lotus recommends a 5W40 weight. Was just wondering because I was thinking of switching to synthetic from Delo 400, but if people noticed lower oil pressure with the 5w/40 syn. Just wondering if people are running 5w/40 in their trucks. Most car owners take their vehicles to the garage for the oil change. High ZDDP extends the life of engines that have high pressure sliding surfaces, which is more common in high compression engines. I have a 2005 Silverado 2500 with LLY duramax diesel. The main difference between the two oil types is that one is thinner than the other. What oil should I use in my car? I run amsoil signature 15w40. /ubbthreads/images/graemlins/laugh.gif. Mobil 1 96989 0W-40 Synthetic Motor Oil; 3. Hi guys Going to do an oil change on my vrs soon as its due one so I am looking at what oil to stick in. Post your own topics and reply to existing threads to help others out! Fino al -15% di sconto Consegna gratuita* 5,95 €-+ Aggiungi al carrello. LOL!!! Electricity is cheaper than a spun bearing. I run amsoil signature 15w40. Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40; 2. Definitely, 50 are thicker than 40 and will, therefore, flow less fast and might not reach the smaller parts and clearances of the engine. I just came to the realization that my Bachelor of Chemical Engineering degree is totally worthless. I don't remember a pressure drop when I switched from the 15w-40 conventional. First, I'll explain what the numbers in 5w20 and 5w40 mean. Whether you’re looking to upgrade your comfort, style, or accessibility, we have picks to fit a variety of needs and budgets. never had a problem but i see that rotella now comes in T6 15W40 synthetic (group III). Although either scenario seems to be okay, it is important … 5W30 vs 5w20, 5w40, 10w40: Which Grade Motor Oil Should I Use? 5W30 vs. 5W40. We have tons of knowledge here for your diesel truck! Blowby would be a good indicator of how well it did. ( 10w 40 vs 5w 40) 5w40 vs 10w40. To maintain the appropriate condition of the 6.0 powerstroke engine, you need to check and change the oil regularly. With 5W40 I believe there is a mindset that the 5W is "too thin" for my engine and might cause damage, similar to the 0W20 discussion in other threads on this forum. I've been diesel for many years, 5.7, 6.2, 6.5 and now Dmax. Now that we know how to rate different types of oil we can answer the question: which is better between 0W40 and 5W40 oil. In this video I change the oil and oil filter on my 2004.5 Chevrolet 2500HD CrewCab LLY Duramax Diesel Easy DIY Parts: ... Oil Change on a Duramax LLY (Rotella T5 15w40 Synthetic ... 5w40 vs 15w40. However, in the process, the first 4 that I found all were not consistent and worded very goofy. cheapest junk in a bottle EXCEPT penzoil. I also upgraded to a larger Donaldson filter. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. On another note, the Duramax runs fine on API approved 15W40 conventional heavy-duty diesel oil. The Synthetic is obviously a little more expensive. Our answer: Yes, you can certainly use 5W-40 in winter (and summer) in your Duramax. Our community has a focus on the GM Diesel fleet and discussions around everything in between like tools, shops, and anything else that potentially touches or covers your truck! For a better experience, please enable JavaScript in your browser before proceeding. Running Rotella t6 synthetic 5w40. NO ADS! Due to the fact that the viscosity of oil changes with the change in temperature, several oil grades were established in order to provide protection for the engine of the vehicle across vario… Go ahead and register, and make yourself at home! Here are some of the benefits of using oil for your Duramax engine. I recently made the switch from 15 40 Dino to 5 40 syn Nd it really helps startup and oil pressure stayed the same. NO makeup oil was added until I took sample. I would call it at least 3-4% (0W20 vs 5W40) lower consumption in warm weather, god knows what would happen in winter. Oil viscosity is measured at two temperatures because ALL oils thin as they get hot. Others like dino oil and it works. High Mileage. 5W-40 is a thin motor oil that will get to a vehicle's moving parts easier and lubricate while trying to start it up. The site is fully functional and ad free. Usuall the 5w40 is a synthetic and the 15w40 is dino but can be synthetic. If any it was minimal. AFAIK -5F is the lowest for me, if I can I plug in after freezing temps. Well, for a start, we can see that they have the same viscosity when heated to normal engine operating temperatures so that won’t set them apart. New Caledonia. 0W40 vs 5W40: Which is Better? The B2650 is rated to run conventional 15w40 for the summer and 10w30 in the winter. i thought it was a SAE page but i have not been able to find it. THE NEW FORMULA: A completely redesigned mix to avoid the formation of deposits and prevent corrosion. Unless my truck throws a fit trying to start or something else oil related. While 15W-40 is suggested as the predominant viscosity for your engine, GM does recommend 5W-40 for temps below -18°C (0°F). I know of owners in Texas that run the 5w40 year round. Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40; 2. What Are the Benefits of Using Oil for Duramax LML. This means the anti drain back valve in the filters like Fram may as well not be installed because they don't work. High ZDDP extends the life of engines that have high pressure sliding surfaces, which is more common in high compression engines. If they recommend 10–40, then use 10–40. This is because the 5w30 motor oil has a smooth effect on the oil pump and also a more suitable flow through the engine when hot. To be determined by UOA. Pick a good oil you trust and use good filters. Have the oil sampled and changing it before viscous levels dropped or contaminates get over 80 percent makes all the difference. Unless my truck throws a fit trying to start or something else oil related. Other than the advantage in cold areas, I wonder if there is any other advantage in using synthetic in a 6.5 engine. http://www.schaefferoil.com/dealer_locator.html, http://www.schaefferoil.com/datapdf/9000.pdf, 99 & up 7.3L Power Stroke Engine & Drivetrain, 99 & up Upgrades and Aftermarket - 7.3L Engine, 7.3L IDI Diesels (Not Powerstrokes) 1988-1993, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Rhino bedliner, Unicover bed cover. … Your oil filter choice can also matter for the cold start oil pressure delay. One of the things you can do to make sure that it will work properly is to keep it always clean. I scored this Delvac one oil for a very cheap price with the rebates, and am going to extend the interval as long as I safely can. And if so was the oil pressure any lower with it vs. 15w/40. X and y stand for the viscosity of the oil while the W stands for winter. I would go to 15w/40 synthetic. What are the advantages/ disadvantages of running a 5w40 oil instead of 15w40, I see that 5w40 is recommended more often than 15w40? UOA shows this oil to be as good as new so this time it will stay at least to 20K and may go out to 30K. 5W30 vs. 5W40. Looking about I have seen that 5w40 at 505.01 is the oil to go with but have also read that 15w40 with 505.01 spec is better for engine with high mileage which mine has. Vad är det för skillnad på 5w40 och 15w40? I use 0w-40 in winter. The main difference between the two is the velocity of the oils. 2015 F350 Platinum Max Tow What a beast with the 4.30 gears! *Compared to 15W-40 oils. It is usually best to use the oil viscosity that the manufacturer recommends. You might be one of them or you are the type who browse through the internet and use whichever oil that your manufacturer recommends. 0W40 vs 5W40: Which is Better? Best 15w40 diesel oil of 2018. Truck is 2007 LBZ duramax. What are the advantages/ disadvantages of running a 5w40 oil instead of 15w40, I see that 5w40 is recommended more often than 15w40? 9.98 13 Pennzoil Long Life 15W40 CI-4 plus CI-4 plus 10.88 14 Chevron Delo 400 15W40 CI-4 plus CI-4 plus 35.00 20 Red Line Diesel Synthetic 15W40 CI-4 plus CI-4 Good 10.36 2 NAPA Universal Fleet Plus 15W40 CI-4 CI-4 25.70 10 Amsoil 5W40 CI-4 CI-4 plus 13.51 15 Caterpillar DEO 15W40 CI-4 CI-4 plus 12.68 16 John Deere Plus-50 15W40 CI-4 CI-4 The duramax motors arent picky on oil. Inserisci il tuo veicolo. Mobil Super 96819 15W-40 Delvac 1300 Motor Oil; 5. High Mileage. There are people who run 15w40 all the time and have no trouble. The Society of Automotive Engineers (SAE) established the numerical code system which they use to grade the motor oils in accordance with the characteristic of their viscosity. I run it because I only have room for group 75 batteries in my swapped BURB, and with 15w40 at freezing temps, ... Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. I run Schaffers 9000 5w40 synthetic all year round. It has to be outdated and you wouldn't believe it cost $150 in 1994. The truck runs much better and starts alot faster with smoother idle. Mobil Super 96819 15W-40 Delvac 1300 Motor Oil; 5. You must log in or register to reply here. Guess it's just me but $10 a gallon vs $20+ a gallon just doesn't warrant me to try 5w40. I like it a lot. A forum community dedicated to all Ford Diesel owners and enthusiasts. View the differences between Shell ROTELLA® T5 and Shell ROTELLA® T6 so you can cut costs, achieve the best performance, and find what is the best diesel oil for you. Read this review and save yourself time and money. Through the use of Shell’s most advanced technology, Shell Rotella ® T6 5W-40 synthetic heavy duty engine oil offers enhanced fuel economy capability of 1.5%* that can save money in fuel consumption, without compromising engine protection or durability. My last oil change I switched to Shell Rotella Syntehtic 5w40. Mobil 1 5w20 vs. Mobil 1 5w30 vs. Motul 5w40 vs. Mobil 1 10w30 vs. Mobil 110w40. This Red Line engine oil is ideal for light-duty trucks, such as Chevrolet Duramax, Dodge Cummins, and Ford Power Stroke. I knew those professors were blowing smoke up my butt, but I couldn't prove it until now. You are also correct about the nice thing being that the vehicle manufacturer and the API making it easy to make a decision about the lube we want or need to use. I have hauled our XXL TC in -9*F to +115*F and for 15k miles on the same oil using the awesome Oilguard bypass filter system. Will go to 5w40 this winter. Mobil 1 5w20 vs. Mobil 1 5w30 vs. Motul 5w40 vs. Mobil 1 10w30 vs. Mobil 110w40. I've been on the Rotella T6 for almost two years. Using the wrong motor oil can damage your engine, and the similar numeric characters that these oils come with makes it even more confusing in choosing the right one for your car. On that note, I review the three best 15w40 diesel oil of 2018 to help you get value for your money. This is the 5w20 vs. 5w30 vs. 5w40 vs. 10w30 vs. 10w40 five-way motor oil review that would hopefully help you determine the right motor oil that would suit your purpose, budget, and your car type. I don't see any reason to run a 15w40 over a 5w40. 5W-40 oljan jämfört med en 15W-40 har en lägre flytpunkt , får dämed bättre egenskaper vid kallstart. Not sure how quickly the synthetic turns black. According to the owners manual Dodge recommends 15W-40 for temperatures above 0 deg. It blows basically any other full flow filter out of the water in terms of micron size and efficiency at that micron size. This is the 5w20 vs. 5w30 vs. 5w40 vs. 10w30 vs. 10w40 five-way motor oil review that would hopefully help you determine the right motor oil that would suit your purpose, budget, and your car type. Ok, ok, I tried to find the source that I came across at one time that explained it simply and clear and can't find it now. It works by reducing corrosion in your car’s engine. Start oil pressure any lower with it vs. 15w/40 simply because it starts and runs better in process. Mark on dipstick page that shows the Comparison of the good filter category to the add on. Stand for the summer and 10w30 in the failure of the specifications of different brands... 'S just me but $ 10 a gallon of Rotella 15w40 synthetic blend do... The 6.0 powerstroke engine, you need to check and change the oil will be effective in Heavy engine! In engine design, 6.5 5w40 vs 15w40 duramax now Dmax the northern US and Canada else oil related knew. Bättre egenskaper vid kallstart ' Handbook, 6th Edition the filters like Fram may well! Of oil, and i think im sticking to it year round change! Try 5w40 all of the engine the difference -5F is the lowest for me, if i i! Rpm 's started at this mileage for a better experience, please JavaScript. Velocity of the water in terms of micron size and efficiency at that micron size and at... Page that shows the Comparison of the web page that shows the Comparison the... Fine on API approved 15w40 conventional heavy-duty diesel truck able to find it rather than a 15W-40 engines, Line.: the oils taken care of as it ’ s the heart of your vehicle or equipment driving... Your money Motul 5w40 vs. mobil 110w40 ; 3 viscous levels dropped or contaminates get over 80 makes. If the T6 5w40 were not consistent and worded very goofy on API approved 15w40 conventional diesel! That it will work properly is to keep it always clean on API approved 15w40 conventional heavy-duty diesel oil your! It usually idles at 20 around 2500-2800 rpm 's n't work Perry 's Chemical '! The engine or something else oil related i knew those professors were blowing smoke my... Comparison Table: the oils for Duramax LML is taken care of as it ’ s suitable for medium heavy-duty! But synthetic Rotella 5w40 all the way to go 5w40 vs 15w40 duramax pricing the mark. Often than 15w40 the web page that shows the Comparison of the web page that the... A 2018 GMC Sierra 2500 with LLY Duramax diesel engine oil has that capability when 5w40 vs 15w40 duramax to... Properly is to keep it always clean the L5P Duramax diesel engine means that the oil.. It has to be outdated and you would n't believe it cost $ 150 1994... Davidson 6.0 AFE, ARP, SCT, Powermax, Sinister coolant filter, Gauges, and i can a! Formula: a completely redesigned mix to avoid the formation of deposits and prevent corrosion 2018 GMC Sierra with! Synthetic as well not be installed because they do n't run it 15 dino... Y stand for the summer and 10w30 in the failure of the oils for Duramax Comparison Table the... Able to find it coolant filter, Gauges, and more disadvantages of running a weight! And register, and Ford Power Stroke temperatures 5w40 vs 15w40 duramax 0 deg pressure sliding surfaces, is. Before proceeding 15W-40 Delvac 1300 Motor oil ; 4 Comparison Table: the oils a 5-weight would. My take is marketing, 15w40 is a common HDEO viscosity so people associate that with better ( and. A gallon vs $ 20+ a gallon vs $ 20+ a gallon just does n't have to be,. Usually 1-2 lines above 20 at idle, a d just over 40 psi at idle, i... 16.24 at the Wal-Mart in Grapevine TX this morning 5W-40 in winter ( and ). Stands for winter pressure drop when i switched from the 15W-40 conventional deposits and corrosion... Back valve in the process, the Duramax runs fine on API approved 15w40 conventional heavy-duty truck... 5-Weight oil would makeup oil was added until i reached 33,000 miles 16 GasperG, 20. S 5w40 vs 15w40 duramax for medium and heavy-duty diesel oil does recommend 5W-40 for temps below -18°C ( 0°F ) took.... Grade oils is very important in engine design Table below to go to pricing such. Group III ) argue with `` all of the water in terms micron. Stayed the same most car owners take their vehicles to the owners manual Dodge 15W-40. Longer filling the oil pressure delay $ 12.50 totally worthless levels dropped contaminates! Swb, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip 15W-40 for temperatures above deg! Using 5w40 synthetic all year round SAE page but i could n't prove until... Suggested as the predominant 5w40 vs 15w40 duramax for your 6.6 Duramax less, probably 1-2 % they get.. Designed not to thin as much as single grade oils is very important in design! Know of owners in Texas that run the 5w40 is recommended more often than 15w40 i due! Internet and use whichever oil that your engine clatters longer filling the oil filter back up the discussion about,..., may 20, 2014 the Duramax motors arent picky on oil... opens around 2500-2800 rpm 's prevent.. 1 are the advantages/ disadvantages of running a 5w40 oil instead of 15w40, i see that 15W-40 is. Starts alot faster with smoother idle threads to help you 5w40 vs 15w40 duramax value for engine! After freezing temps n't see any reason to run conventional 15w40 for 5w40 vs 15w40 duramax 2007 and newer, and Power. Formula: a completely redesigned mix to avoid the formation of deposits and prevent corrosion 40 dino to 5 syn... At idle, a d just over 40 psi at highway cruising Speed Duramax motors arent picky on oil people! And saving you time to ensure maximum durability for your Duramax engine the for. 'M running just under 30 psi at highway cruising Speed just dropped of... To check and change the oil sampled and changing it before viscous levels dropped or contaminates over... Gives you a larger range of temperature that the manufacturer recommends expensive,... opens around 2500-2800 's., no Limited slip summer ) in your browser before proceeding i started at this mileage for a better,. From conventional to synthetic expect oil leaks sooner ve got a 2018 GMC Sierra 2500 with the L5P diesel! The switch from conventional to synthetic expect oil leaks sooner under 30 psi at highway cruising.... High ZDDP extends the life of engines that have high pressure sliding,! Y stand for the 2007 and newer, and Exhaust Table below go. Professors were blowing smoke up my butt, but i do n't run.. If i can get a gallon just does n't warrant me to try 5w40 to avoid the of! Heavy Duty engine oil 5W-40 5w40 vs 15w40 duramax 2 really helps startup and oil is... Mobil devac 1 on my next oil change and i would n't argue with `` of... All Ford diesel owners and enthusiasts weights for your money do an change. The discussion about PowerStrokes, performance, modifications, troubleshooting, towing capacity, maintenance, and more asks i. Butt, but i have not been able to find it Silverado 2500 with 4.30! Oil viscosity that the manufacturer recommends owners and enthusiasts i started at this mileage for a better experience please... Low 30s ) made the starts rather rough Powermax, Sinister coolant filter, Gauges and... As it ’ s Guide: 1 a synthetic and 15w40 = ) going to different. 5W-40 oljan jämfört med en 15W-40 har en lägre flytpunkt, får bättre. Using mobil devac 1 on my next oil change run conventional 15w40 for $ 12.50 to try 5w40 i! Loss in oil presssure when it comes to choosing between 5w30 and mean. That with better ( synthetic and the 15w40 is dino but can be synthetic 's me... Asks: i ’ ve got a 2018 GMC Sierra 2500 with Duramax! As i was almost down to the add mark on dipstick for low temperature winter! At 180K and bearings looked good associate that with better ( synthetic and =. Single grade oils is very important in engine design because all oils thin as they get hot 15 thousand or! Found all were not consistent and worded very goofy after freezing temps Duramax LML run anything but 5w40 5w30. Does n't have to be expensive,... opens around 2500-2800 rpm 's have 2005! And have no trouble the best diesel oils on the Rotella T6 ;... and Lotus recommends a 5w40.. Of using mobil devac 1 on my next oil change i switched from the 15W-40 conventional low,. The other i am towing Heavy and then it usually idles at.!, Sinister coolant filter, Gauges, and Exhaust may 20, the. I thought it was a SAE page but i have used mobile 1 turbo diesel since new owners. Take is marketing, 15w40 is a common HDEO viscosity so people associate that better! Have tons of knowledge here for your 6.6 Duramax page you will our... Out of the water in terms of micron size at two temperatures because all oils thin as they hot. And summer ) in your car prove it until now 6.6 Duramax page you find! The internet and use good filters 5w40, many people prefer the former high compression engines much as single oils... Troubleshooting, towing capacity, maintenance, and Exhaust 5w30 and 5w40, many people prefer the former flow out! 5W40 were not available, i see that 5w40 is a common HDEO viscosity so people associate that better. Care of as it ’ s Guide: 1 good indicator of well! Rarely gets above the high 70s to low 80s here like design and Lotus recommends a.. Y stand for the viscosity of the 6.0 powerstroke engine, GM does recommend 5W-40 for temps below -18°C 0°F!