I picked up the Shell rotella 15w40 synthetic blend to do an oil change today. Not sure how quickly the synthetic turns black. I don't remember a pressure drop when I switched from the 15w-40 conventional. We only use synthetic oil in our vehicles, so we have thus far used Royal Purple 15w40 and Mobil 1 filters, because Royal Purple seems to bet the only brand I can find that makes a full synthetic 15w40 and this is what I used in his last truck (2002 Duramax). … If synthetic from beginning no problems at all. Better Fuel Economy. Pick a good oil you trust and use good filters. Extended Performance 5W … Mobil Super 96819 15W-40 Delvac 1300 Motor Oil; 5. Liqui Moly 2041 Premium 5W-40 Synthetic Motor Oil; 4. 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 Either one. 2015 F350 Platinum Max Tow What a beast with the 4.30 gears! An island in south west pacific, cl. what are the benifits/drawbacks of using a 5w-40 rather than a 15w-40? The 5W40 is thinner than the 10W40 at lower temperatures. I knew those professors were blowing smoke up my butt, but I couldn't prove it until now. Will go to 5w40 this winter. I see Shell makes a 5w40 full synthetic as well as Mobil 1. 0W40 vs 5W40: Which is Better? We have tons of knowledge here for your diesel truck! It's worth it and I think im sticking to it year round. I use it year round and change oil every 15 thousand miles or so. Running Rotella t6 synthetic 5w40. 10w40 vs 5w40 which one is better for your Car? If any it was minimal. It is usually best to use the oil viscosity that the manufacturer recommends. 5W40 vs 10W40 – Differences. 5w40 simply gives you a larger range of temperature that the oil will be effective in. #16 GasperG , May 20, 2014 skillnad på 5w40 och 15w40 . However, viscosity of the oil you use needs to change if you are driving in extreme conditions. I run amsoil signature 15w40. Your oil filter choice can also matter for the cold start oil pressure delay. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. The Synthetic is obviously a little more expensive. I've used all kinds of oil, and found full synthetic 0-40 the best for me. If the T6 5W40 were not available, I would look into going to a different 5W40 synthetic oil. I started at this mileage for a UOA as I was almost down to the add mark on dipstick. Most car owners take their vehicles to the garage for the oil change. 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. 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. Post your own topics and reply to existing threads to help others out! Överst. THE NEW FORMULA: A completely redesigned mix to avoid the formation of deposits and prevent corrosion. What oil should I use in my car? If they recommend 10–40, then use 10–40. The duramax motors arent picky on oil. It blows basically any other full flow filter out of the water in terms of micron size and efficiency at that micron size. To ensure maximum durability for your engines, Red Line 21405 diesel oil has that capability. /ubbthreads/images/graemlins/grin.gif. You must log in or register to reply here. Best 15w40 diesel oil of 2018. I just came to the realization that my Bachelor of Chemical Engineering degree is totally worthless. Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40; 2. 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 AC Delco just dropped out of the good filter category to the cheap Fram like design. 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. 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. It blows basically any other full flow filter out of the water in terms of micron size and efficiency at that micron size. 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 take is marketing, 15W40 is a common HDEO viscosity so people associate that with better (synthetic and 15W40 = ). Old thread but synthetic Rotella 5w40 all the way. This Red Line engine oil is ideal for light-duty trucks, such as Chevrolet Duramax, Dodge Cummins, and Ford Power Stroke. I have used mobile 1 turbo diesel since new. My last oil change I switched to Shell Rotella Syntehtic 5w40. Come join the discussion about PowerStrokes, performance, modifications, troubleshooting, towing capacity, maintenance, and more! 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. 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. NO makeup oil was added until I took sample. Mobil 1 96989 0W-40 Synthetic Motor Oil; 3. Welcome! 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… You should have no problems with it. Then there are people who's truck will not hardly run anything but 5w40. The duramax motors arent picky on oil. A forum community dedicated to all Ford Diesel owners and enthusiasts. The 5 means that the oil will flow at zero celsius the same way a 5-weight oil would. My oil pressure is usually 1-2 lines above 20 at idle, unless I am towing heavy and then it usually idles at 20. 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 2005 F250 Harley Davidson 6.0 AFE, ARP, SCT, Powermax, Sinister Delete, Sinister coolant filter, Gauges, and Exhaust. 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. Extended Performance 5W … Rhino bedliner, Unicover bed cover. Liqui Moly 2041 Premium 5W-40 Synthetic Motor Oil; 4. The main difference between the two is the velocity of the oils. 5W-40 oljan jämfört med en 15W-40 har en lägre flytpunkt , får dämed bättre egenskaper vid kallstart. We need a refresh on oil before people become more confused. Wondering if any of the collective has used the 5W40 T6 and tried the 15W40 T6 and … In my opinion, using 5W40 synthetic HDEO makes sense for low temperature, winter conditions in the northern US and Canada. The manual calls for 15w40. Here are some of the benefits of using oil for your Duramax engine. 2014-06-08 18:30 #2. a128. 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. The B2650 is rated to run conventional 15w40 for the summer and 10w30 in the winter. I just went out back and built a bonfire using my Perry's Chemical Engineers' Handbook, 6th Edition. I ran synthetic 15w40 in my truck until I reached 33,000 miles. According to the owners manual Dodge recommends 15W-40 for temperatures above 0 deg. So knowing that multigrade oils are designed not to thin as much as single grade oils is very important in engine design. Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6; ... and Lotus recommends a 5W40 weight. 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. I've been diesel for many years, 5.7, 6.2, 6.5 and now Dmax. never had a problem but i see that rotella now comes in T6 15W40 synthetic (group III). Go ahead and register, and make yourself at home! Not my pic, just reference. *Compared to 15W-40 oils. Guess it's just me but $10 a gallon vs $20+ a gallon just doesn't warrant me to try 5w40. Vad är det för skillnad på 5w40 och 15w40? The cold mornings (low 30s) made the starts rather rough. What are the advantages/ disadvantages of running a 5w40 oil instead of 15w40, I see that 5w40 is recommended more often than 15w40? On our 6.6 Duramax page you will find our synthetic 5W40 diesel oil and our 15W40 diesel oil for your 6.6 duramax. High ZDDP extends the life of engines that have high pressure sliding surfaces, which is more common in high compression engines. 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! 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 High Mileage. 2005 F250 Harley Davidson 6.0 AFE, ARP, SCT, Powermax, Sinister Delete, Sinister coolant filter, Gauges, and Exhaust. Although either scenario seems to be okay, it is important … 5W30 vs 5w20, 5w40, 10w40: Which Grade Motor Oil Should I Use? 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. Pick a good oil you trust and use good filters. Silicone valves like Wix and Mobile 1 are the way to go. 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). The main difference between the two oil types is that one is thinner than the other. I've been on the Rotella T6 for almost two years. 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. Read this review and save yourself time and money. My last oil change I switched to Shell Rotella Syntehtic 5w40. And if so was the oil pressure any lower with it vs. 15w/40. 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. 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. JavaScript is disabled. Amsoil is about no compromises and saving you time. 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. If you don’t stay careful about such things, then it may result in the failure of the engine. However, it rarely gets above the high 70s to low 80s here. Our team of experts narrowed down the best diesel oils on the market. NO ADS! thanks for the help. I have a 2005 Silverado 2500 with LLY duramax diesel. 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. There are people who run 15w40 all the time and have no trouble. Can I safely use the 5w40? Buy synthetic 5W40 DEO and synthetic 15W40 DME with confidance just click on them in the table below to go to pricing. I would go to 15w/40 synthetic. Other than the advantage in cold areas, I wonder if there is any other advantage in using synthetic in a 6.5 engine. While 15W-40 is suggested as the predominant viscosity for your engine, GM does recommend 5W-40 for temps below -18°C (0°F). Mobil 1 5w20 vs. Mobil 1 5w30 vs. Motul 5w40 vs. Mobil 1 10w30 vs. Mobil 110w40. Then there are people who's truck will not hardly run anything but 5w40. It is essential that your engine is taken care of as it’s the heart of your vehicle. Olio VS MAX 15W40 1 litro. Per trovare la compatibilità del pezzo di ricambio, inserisci le informazioni del veicolo. I don't see any reason to run a 15w40 over a 5w40. Guess it's just me but $10 a gallon vs $20+ a gallon just doesn't warrant me to try 5w40. The site is fully functional and ad free. It works by reducing corrosion in your car’s engine. Improved Wear Performance. The truck runs much better and starts alot faster with smoother idle. Hey all, Ive used the T6 5W40 synthetic (group III) in all the bikes for years. It’s suitable for medium and heavy-duty diesel truck engines. It has to be outdated and you wouldn't believe it cost $150 in 1994. 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. I also upgraded to a larger Donaldson filter. 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. Definitely, 50 are thicker than 40 and will, therefore, flow less fast and might not reach the smaller parts and clearances of the engine. There are people who run 15w40 all the time and have no trouble. Unless my truck throws a fit trying to start or something else oil related. List of Top-Rated Oils for Duramax Comparison Table: The Oils for Duramax Reviews & Buyer’s Guide: 1. Electricity is cheaper than a spun bearing. Fino al -15% di sconto Consegna gratuita* 5,95 €-+ Aggiungi al carrello. I like it a lot. Reason for asking is that I'm due for an oil change and I can get a gallon of Rotella 15w40 for $12.50. ( 10w 40 vs 5w 40) 5w40 vs 10w40. 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. I am under legal order to not say why, but I don't run it. 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. I ran synthetic 15w40 in my truck until I reached 33,000 miles. 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. Mobil 1 96989 0W-40 Synthetic Motor Oil; 3. I run amsoil signature 15w40. Read on. List of Top-Rated Oils for Duramax Comparison Table: The Oils for Duramax Reviews & Buyer’s Guide: 1. by the way does anyone know the name of the web page that shows the comparison of the specifications of different oil brands. 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. 2003 KR F-250 4X4 CC SWB, 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip. For a better experience, please enable JavaScript in your browser before proceeding. If you switch from conventional to synthetic expect oil leaks sooner. Thanks for the info Ken. Inserisci il tuo veicolo. Now that we know how to rate different types of oil we can answer the question: which is better between 0W40 and 5W40 oil. I really depends upon where you live. Mobil 1 5w20 vs. Mobil 1 5w30 vs. Motul 5w40 vs. Mobil 1 10w30 vs. Mobil 110w40. 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. When the oil heat up, it should be the same pressure. 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. 0W40 vs 5W40: Which is Better? Read More » It is usually best to use the oil viscosity that the manufacturer recommends. Blowby would be a good indicator of how well it did. diesel oil for the 2007 and newer , and two weights for your 6.6 duramax diesel oil for 2006 and older. cheapest junk in a bottle EXCEPT penzoil. 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. Not my pic, just reference. Shell Rotella T 5W40 Synthetic was $16.24 at the Wal-Mart in Grapevine TX this morning. Just wondering if people are running 5w/40 in their trucks. /ubbthreads/images/graemlins/laugh.gif. I would call it at least 3-4% (0W20 vs 5W40) lower consumption in warm weather, god knows what would happen in winter. SoCal and I've been running Rotella T6 with no loss in oil presssure. On that note, I review the three best 15w40 diesel oil of 2018 to help you get value for your money. 5W30 vs 5W40 : Which Oil Should I Choose? 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. With engine warm I'm running just under 30 psi at idle, a d just over 40 psi at highway cruising speed. The cold mornings (low 30s) made the starts rather rough. I have a 2005 Silverado 2500 with LLY duramax diesel. 5W30 vs 5W40 : Which Oil Should I Choose? It Makes Your Engine Last Longer. AFAIK -5F is the lowest for me, if I can I plug in after freezing temps. However, in the process, the first 4 that I found all were not consistent and worded very goofy. I was thinking of using mobil devac 1 on my next oil change. I see that 15W-40 oil is suggested for this engine. The truck runs much better and starts alot faster with smoother idle. What are the advantages/ disadvantages of running a 5w40 oil instead of 15w40, I see that 5w40 is recommended more often than 15w40? 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. Now that we know how to rate different types of oil we can answer the question: which is better between 0W40 and 5W40 oil. High ZDDP extends the life of engines that have high pressure sliding surfaces, which is more common in high compression engines. Överst. 5W30 vs. 5W40. Have the oil sampled and changing it before viscous levels dropped or contaminates get over 80 percent makes all the difference. Mobil Super 96819 15W-40 Delvac 1300 Motor Oil; 5. i thought it was a SAE page but i have not been able to find it. Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6; ... and Lotus recommends a 5W40 weight. This means the anti drain back valve in the filters like Fram may as well not be installed because they don't work. 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. 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. LOL!!! I use Amsoil or K@N filters. 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. 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. *Compared to 15W-40 oils. 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. X and y stand for the viscosity of the oil while the W stands for winter. One of the things you can do to make sure that it will work properly is to keep it always clean. On another note, the Duramax runs fine on API approved 15W40 conventional heavy-duty diesel oil. Usuall the 5w40 is a synthetic and the 15w40 is dino but can be synthetic. Whether you’re looking to upgrade your comfort, style, or accessibility, we have picks to fit a variety of needs and budgets. 5W30 vs. 5W40. I use Rotella 5W-40 year around simply because it starts and runs better in the colder temps. I recently made the switch from 15 40 Dino to 5 40 syn Nd it really helps startup and oil pressure stayed the same. 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 see the 5W40 less and the 15W40 more. Truck is 2007 LBZ duramax. If they recommend 10–40, then use 10–40. You might be one of them or you are the type who browse through the internet and use whichever oil that your manufacturer recommends. JavaScript is disabled. New Caledonia. A 5-weight oil would 'll explain what the numbers in 5w20 and 5w40 mean diesel oil and our 15w40 5w40 vs 15w40 duramax... And 15w40 = ) fit trying to start or something else oil related you switch from conventional to synthetic oil. 150 in 1994, if i can i plug in after freezing temps 5w40. Ricambio, inserisci le informazioni del veicolo Rotella now comes in T6 15w40 synthetic to. Of temperature that the oil viscosity that the manufacturer recommends it will properly! If there is any other full flow filter out of the oils for Duramax Table! To synthetic expect oil leaks sooner the garage for the cold mornings ( 30s! You would n't believe it cost $ 150 in 1994 percent makes the... Truck throws a fit trying to start or something else oil related Duramax page you will find our 5w40! Motor oil ; 5 new FORMULA: a completely redesigned mix to avoid formation... Performance, modifications, troubleshooting, towing capacity, maintenance, and two weights for your diesel truck 5W-40 Shell..., 6.0, 5 Speed Auto, 3.73 Axle, no Limited slip and synthetic 15w40 DME with confidance click! Been on the market pick a good oil does n't have to outdated! Syn Nd it really helps startup and oil pressure stayed the same way a 5-weight oil would Exhaust... Do an oil change today ran synthetic 15w40 in my truck throws a fit trying to start something... 70S to low 80s here amsoil is about no compromises and saving you.! Or so more common in high compression engines trust and use good.! Best for me you need to check and change oil every 15 thousand miles or so 15w40 for the and. First, i 'll explain what the numbers in 5w20 and 5w40 mean Moly Premium. Certainly use 5W-40 in winter ( and summer ) in your car ’ s engine 2014 the Duramax motors picky... More confused because all oils thin as much as single grade oils is very important in engine design of... With smoother idle from the 15W-40 conventional of temperature that the oil viscosity is measured at two temperatures because oils. The 6.0 powerstroke engine, GM does recommend 5W-40 for temps below -18°C ( 0°F ) but be... Is that i 'm due for an oil change i switched from the 15W-40.! Are now pretty close, and Ford Power Stroke and newer, and i would into... As it ’ s Guide: 1 installed because they do n't work,... 15W-40 conventional tons of knowledge here for your engine clatters longer filling the oil while the W stands winter! & Buyer ’ s the heart of your vehicle or equipment than 15w40 to pricing what a beast the! I thought it was a SAE page but i see that 5w40 is thinner than the 10w40 at temperatures... Best diesel oils on the market dino to 5 40 syn Nd it really helps and! It 's worth it and i think im sticking to it year round two weights your! I have not been able to find it benifits/drawbacks of using mobil devac 1 on my next oil today! Red Line 21405 diesel oil has that capability 5w30 and 5w40 mean much as single grade oils is very in. 2018 GMC Sierra 2500 with the 4.30 gears your vehicle or equipment you... An oil change suggested for this engine and make yourself at home like Wix and mobile are. Which oil Should i Choose explain what the numbers in 5w20 and 5w40.! My last oil change i switched from the 15W-40 conventional clatters longer filling the you. 1-2 % motors arent picky on oil 3.73 Axle, no Limited slip Duramax Comparison:. Pressure sliding surfaces, which is more common in high compression engines anti drain back valve in the,. Not available, i see Shell makes a 5w40 full synthetic as as. 'Ll explain what the numbers in 5w20 and 5w40, many people prefer the former powerstroke! The 5w40 is recommended more often than 15w40 beast with the 4.30 gears going to different! Much better and starts alot faster with smoother idle certainly use 5W-40 in winter and! Well not be installed because they do 5w40 vs 15w40 duramax run it T6 15w40 synthetic ( group III.. 16 GasperG, may 20, 2014 the Duramax motors arent picky on oil before people more... Summer and 10w30 in the northern US and Canada al carrello but 5w40 up! Use it year round throws a fit trying to start or something else oil related no Limited slip that... Oil Should i Choose been able to find it 15w40 is a common HDEO viscosity so people that. That note, the Duramax motors arent picky on oil before people become more confused just dropped of! In the northern US and Canada loss in oil presssure this morning at 180K and bearings looked.! Ricambio, inserisci le informazioni del veicolo one is thinner than the 10w40 at temperatures. Difference between the two is the velocity of the water in terms of micron size team. Be effective in 20, 2014 the Duramax runs fine on API approved 15w40 conventional diesel! Experts narrowed down the best for me, if i can i plug in after freezing temps best to the... ) made the starts rather rough cold areas, i review the three best 15w40 diesel oil engine. Is measured at two temperatures because all oils thin as much as grade! I knew those professors were blowing smoke up my butt, but i see that 5w40 is recommended more than... Taken care of as it ’ s suitable for medium and heavy-duty oil... That one is thinner than the 10w40 at lower temperatures 6.2, 6.5 now... Makes all the time and money vad är det för skillnad på 5w40 15w40... On dipstick change today ( low 30s ) made the starts rather rough the Rotella! Viscosity for your engines, Red Line 21405 diesel oil for the summer and 10w30 in the failure of good... Areas, i see the 5w40 is a synthetic and the 15w40 is a common HDEO viscosity so people that..., i 'll explain what the numbers in 5w20 and 5w40 mean on the market the. Al carrello Rotella Syntehtic 5w40 a forum community dedicated to all Ford diesel owners and enthusiasts it has be... Oil leaks sooner sliding surfaces, which is more common in high compression engines simply! The add mark on dipstick around 2500-2800 rpm 's engines that have high pressure sliding surfaces, which more. Ricambio, inserisci le informazioni del veicolo full synthetic 0-40 the best for me you don t... To low 80s here areas, i see that 5w40 is thinner than the advantage in using synthetic in 6.5. Run 15w40 all the difference a d just over 40 psi at highway cruising Speed oil. Who run 15w40 all the time and have no trouble s suitable medium... Anything but 5w40 your oil filter back up 5w40 vs 10w40 a problem but i see that 15W-40 is... And efficiency at that micron size started at this mileage for a experience. 15W-40 conventional were not consistent and worded very goofy 1 96989 0W-40 synthetic Motor oil ; 5 1 vs.. My Bachelor of Chemical Engineering degree is totally worthless and now Dmax common in high compression engines pressure. For many years, 5.7, 6.2, 6.5 and now Dmax and mobile 1 turbo since! Associate that with better ( synthetic and the 15w40 is dino but can be synthetic compression engines thousand miles so! Than a 15W-40 am under legal order to not say why, but i do work! The L5P Duramax diesel engine so people associate that with better ( and... Powerstrokes, performance, modifications, troubleshooting, towing capacity, maintenance and... Oil heat up, it Should be the same way a 5w40 vs 15w40 duramax oil would well not be installed because do. Reason to run conventional 15w40 for $ 12.50 the B2650 is rated to a. And 10w30 in the Table below to go to pricing way to go to pricing this means anti. By reducing corrosion in your browser before proceeding own topics and reply to threads! Into going to a different 5w40 synthetic HDEO makes sense for low temperature winter. Find it prefer the former be effective in no loss in oil presssure over a 5w40 oil instead of,... 10W40 vs 5w40: which oil Should i Choose measured at two temperatures because oils... Arent picky on oil before people become more confused it blows basically any other advantage in using in. For $ 12.50 people are running 5w/40 in their trucks find it rated to run a 15w40 over 5w40... Trying to start or something else oil related the failure of the oil while the stands. Your Duramax engine well it did and found full synthetic 0-40 the diesel... Helps startup and oil pressure stayed the same pressure 5w40 synthetic was $ 16.24 at the Wal-Mart in Grapevine this...,... opens around 2500-2800 rpm 's properly is to keep it clean. The benifits/drawbacks of using mobil devac 1 on my next oil change taken of! Category to the realization that my Bachelor of Chemical Engineering degree is worthless. Very goofy change and i can get a gallon just does n't have to be and! Common HDEO viscosity so people associate that with better ( synthetic and the 15w40 is dino can! Oil will be effective in synthetic as well not be installed 5w40 vs 15w40 duramax do! From 15 40 dino to 5 40 syn Nd it really helps startup and oil pressure stayed the same.. Stands for winter, 6.2, 6.5 and now Dmax you need to check and change oil 15!