If the 5W40 doesn't hold up, you can switch to 15W40 with confidence. I would advise the choice of 5W40 vs 15W40 be based on the number of cold starts. 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. 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. Whether you’re looking to upgrade your comfort, style, or accessibility, we have picks to fit a variety of needs and budgets. I see the 5W40 less and the 15W40 more. I used to live in SC, MS, FL, and AL. 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. Did you ever figure out if it's API certified? vs… 5W40 didn't exist then. However it seems that everyone wants to use 10W30 in the 6.7 but I was told no dealer in North Texas (specifically DFW area) uses 10W30 and all uses 15W40 or 5W40 full synthetic (very expensive oil change). I run 5w-40 in every climate from below 0 to 100+F temps. Valvoline™ Premium Blue™ is “The Only One”™ solely endorsed and suggested by Cummins. Rotella T6 is synthetic and comes in 5w40, Rotella T4 15w40 is conventional oil. Over the last 15 years or so I have UOA at one year, two, years, three years and found no issues. One of the greatest things about this diesel engine oil is its versatility. You should have no problems with it. That is always a good indicator as well. Back to the number of cold starts, if you have to start the MH regularly in cold weather, that's when the 5W40 is more indicated because cold starts with thick oil tend to be the ones with more wear, more filter bypass events, etc. We were freezing up until about a week ago. Another benefit, some have seen, at least with the, Absolutely, and it is also printed on the label and bottle. 00 ($11.58/case of oil) If that's how the MH is operated, the 15W40 is the way to go IMO. Improved fuel economy potential over conventional 15W-40 oils; Valvoline™ Premium Blue™ has a unique 10,000 mile drain extension in Cummins® X15 engines enabling up to 60,000 miles when average fuel efficiency is 6.5 mpg or higher; Enhanced protection against oil oxidation The N-14 is not hard on oil AT ALL! Despite being in Arizona, I don’t live at the lower elevations. I used it in my '06 5.9 Liter Dodge Cummins turbo diesel truck. It's fine to switch between the 2 weights. i just switched mine over to amsoil 5w40 diesel synthetic havent gotten enough miles put on it since then to decide if its any better than the hvyduty diesel and marine 15w40 amsoil, Correct. 6.0 Transmission Cooler. The results were proven through extensive collaborative development efforts, covering millions of miles of real-world truck testing. Differences between 5w40 vs. 5w50 motor oil. It is usually best to use the oil viscosity that the manufacturer recommends. Oil can't read a calendar so my advice is forget the "one year" stuff. Better Fuel Economy. Data Sheet on Shear Stability of our 5W-40 and fuel economy, AMSOIL Heavy Duty Diesel and Marine CI-4 (AME), Buy Online at Wholesale Factory-Direct - Click Here, AMSOIL Premium CJ-4 Synthetic 5W-40 Diesel Oil (DEO), AMSOIL Premium CJ-4 Synthetic 15W-40 Diesel Oil (DME), AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil (AME), http://eolcs.api.org/DisplayLicenseInfo.asp?LicenseNo=0995, Synthetic Blend 15W-40 Heavy Duty Motor Oil (PCO), AMSOIL OE 15W-40 Synthetic Diesel Oil (OED), AMSOIL OE 10W-30 Synthetic Diesel Oil (OEC), 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. Works great! The Premium Blue brand offers a full lineup of conventional, synthetic blend, and synthetic engine oils developed for diesel, gas, and natural gas engine applications. Shell Rotella T4 Triple Protection Conventional 15W-40 Diesel Engine Oil 6. Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 5. A $20 oil analysis kit is a LOT cheaper than 14 gallons of synthetic oil!!!!!!! I'm sure that ol Cummins will love the Rotella 5W40 either way. Royal Purple 15W40 Oil. Just wondering if there's any advantage to using the OEM recommended viscosity vs the heavier 5w40. Spend the money on clean air filters and clean fuel filters as well as coolant. here in south dakota the ford dealer has me and our company using 10w-30 diesel oil in all of our powerstrokes 7.3, 6.0, 6.4 year around and have no complaints or problems. The Ford manual doesn't state that you can ONLY use a 15w40, instead it has a little chart of viscosity's and the temps where you use them. Use 5W40, test every 5K (or one year) or so. Motul 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil 7. Standard OCI for the fleet back then, 45,000 miles on regular 15w40 (Chevron Delo 400). 5w40 vs 15w40.Delo. 02 F250, 4X4, 4R100, 3.73, B&M Transmission Pan, Edge CTS Digital Gage, Tymar 4" Exhaust, Tymar Intake & HPX & TS 6 Position Chip. Cummins approved for my 2013 RAM. JavaScript is disabled. If you are set up to sample, you can conduct your own test. Regular CK-4 or CJ-4 15w40 and the engine will vastly out live the motorhome. Just added a FS2500 bypass filter plus the factory Fleetguard FF filter. ... Grand Rapids, MN. Thanks for the info Ken. ... 2014 Ram 1500 ecodiesel, 2014 Ram 1500 5.7, 2009 Ram 2500 Cummins 6.7, 2006 Ram 2500 Cummins 5.9, 2005 Ram 3500 Cummins 5.9, 1999 Ram 3500 Cummins 5.9, 1995 Ram 1500 360, 1983 Ram D150 318, 1975 Ram D150 360. Improved Wear Performance. Cummins CES 20071, 20072, 20076, 20077, 20078, First, AMSOIL INC. works closely with major additive companies to select the top performing, and usually most expensive, passenger car and heavy duty diesel motor oil additives. The motor is a Cummins N14. We also will utilize a highly shear stable V.I. The 5 means that the oil will flow at zero celsius the same way a 5-weight oil would. Buy Royal Purple 15W40 Oil. I think with UOA and the bypass filter, I’m hopeful. At the same time, I saw one of Cummins' earliest Model H engines of 1934, which is the direct core ancestor of the N14. My only synthetic option is the Rotella T6 5W-40. The Synthetic 5w-40 just says that the 40 weight oil will maintain a 40 weight viscosity down to 5 degrees vs. 15 degrees for the conventional. 280k on 15w40 and no internal problems. Most diesels are also turbo-charged, which means that they compress a much larger volume of air and suspended particles. 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. There weren't many choices for oil related to diesels and the best dual rated oils (i.e. JavaScript is disabled. If your only synthetic option is T6 in 5w40 then run it if you are dead set on extended drains. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. I have a 1999 Monaco Signature 45’ Class A. If you can use the starting advantage then run the syn. John Wood's valve body. Valvoline Premium Blue is THE ONLY ONE™ engine oil exclusively recommended and endorsed by Cummins. 7. That being said and as mentioned … Wading through the combination of marketing spin, specifications, and technical information can make understanding which product to use and finding the best value in motor oil a challenge. One of the most important things that you need to know about 6.7 Cummins synthetic oil is that the different viscosity ratings provide various levels of performance, specifically in relation to temperature. 5W-40 vs 15W-40 for 6.7 Cummins. AMSOIL Inc.'s products and formulations outperform API licensed oils. 10w40 vs 5w40 which one is better for your Car? Definitely, 50 are thicker than 40 and will, therefore, flow less fast and might not reach the smaller parts and clearances of the engine. Grado SAE 15W-40 Viscosità cinematica a 40 C, mm2/s, ASTM D445 109 Viscosità cinematica a 100 C, mm2/s, ASTM D445 14.1 Indice di viscosità, ASTM D2270 130 Densità @ 15 C, g/ml, ASTM D1298 0.875 Pour Point, °C, ASTM D97 -33 I can’t find anyone who has run the 5W40 in that engine, hence my concerns. It may not display this or other websites correctly. I hate wasting good oil just because it’s been. They are designed to provide excellent protection against oxidatio 5W30 vs. 5W40 Motor Oil – Comparison of 2021 As an Amazon Associate, I earn from qualifying purchases Among all the options that are available in the market in the case of motor oils, the ones that make car owners fall into a dilemma the most are 5W40 and 5W30. Truck is an old school IDI diesel with bypass filtration. The 250,000 mile engine only consumed 1/2 quart of this oil over 6000 miles. Valvoline/Cummins Premium Blue 15W40 Union 76 Guardol QLT 15W40 Union 76 T5X Heavy Duty 15W-40 Kendall Super-D 3 15W40, 10W30 Quaker State FCI HDX Plus 15W40 Exxon XD-3 Extra 15W40 Phillips 66 Super HD II 15W-40 Conoco HD Fleet Supreme 15W-40, 10W-30 Citgo Mystik Premium Fleet 15W-40 Citgo Mystik JT-8 15W-40, 15W-50, 10W-30 The only advantage the 5w- will buy you is below freezing starts. It is produced to be used in diesel engines, which collect carbon quicker than gasoline engines, owing to most modern diesels being direct-injection designs. IH Bellowed Up-Pipes, RiffRaff AIH delete plug, Riffraff FRx Kit. Cummins CES 20081; Cummins CES 20086; Proprietà e specifiche del Mobilgard hsd+ 15w40. I have full confidence in running the 5W-40 from AMSOIL but am curious on the technical aspect of "why" as far as Dodge or even Cummins is concerned. Then we work with the additive company to. However it seems that everyone wants to use 10W30 in the 6.7 but I was told no dealer in North Texas (specifically DFW area) uses 10W30 and all uses 15W40 or 5W40 full synthetic (very expensive oil change). The 5w and 15w stand for degrees. The Premium Blue brand offers a full lineup of conventional, synthetic blend, and synthetic engine oils developed for diesel, gas, and natural gas engine applications. Used in my 2015 Ram 2500. Reply. It definitely helped in the cold morning start ups in comparison to the 15w-40 Amsoil. ( 10w 40 vs 5w 40) 5w40 vs 10w40. I know of owners in Texas that run the 5w40 year round. Driven Diesel Fuel Tank Mod & Pre-Pump Filter. The 15w40 would be just fine. My last oil change I switched to Shell Rotella Syntehtic 5w40. My plan was to go as long as possible using analysis. Most car owners don’t even bother with the issue of an oil change for their vehicles. Come join the discussion about PowerStrokes, performance, modifications, troubleshooting, towing capacity, maintenance, and more! Trucks ran trouble free to near a million miles (target sell was 900,000 miles). Then there are people who's truck will not hardly run anything but 5w40. 5W30 is a type of motor oil that has a cold viscosity of 5 and hot viscosity of 30. Usuall the 5w40 is a synthetic and the 15w40 is dino but can be synthetic. Q: Are synthetic oils better for 6.7 Cummins … Even 15W40 was relatively new in 1986. 5W30 was new and whiz-bang. Royal Purple 15W40 Oil Of course you gotta plug the old girl in when she gets around 20* and lower and let it warm up, it's a diesel. Till now I’ve ran engine 6k miles on this oil haven’t had any problems engine temperature runs smooth; So far so good. You should have no problems with it. If they recommend 10–40, then use 10–40. Getting the right motor oil and the best value both play a role in managing preventive maintenance and expenses. Higher starting TBN doesn't necessarily mean it lasts longer though. You are using an out of date browser. Most people may run a 5W-40 in the winter, or year round. If you go to Engine oil ? I used 15w-40 religiously until about 80k miles and then I switched over to 5w-40 and absolutely love it. Synthetic oil does make the truck run a little smoother. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. I may be living in the past just a little and the oil would likely do fine, but if it were mine, I would sample 5W40 regularly to monitor viscosity to satisfy myself. As mentioned above, I prefer lower weight oils due to the increased fuel economy, but never having a diesel before, why would even AMSOIL say the 15W-40 is preferred above 32 deg. improver used in the API licensed petroleum formula. 96 F250 PS XLT 4X4 long box, 5sp,4.10, manual hubs,pyro+boost guages, Dark Toumaline, add a leaf, Dale's TYMAR, and HX hose, downpipe, coolant filter, Luk clutch. We then utilize a blend of synthetic basestocks with known performance characteristics as a replacement for the petroleum basestocks to optimize performance in areas of lubricity, volatility, viscosity index, oxidation and nitration resistance, pour points, flash points, deposit control, soot handling, emissions, etc. Valvoline Premium Blue Classic if it's still available. 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 I haven’t filled it with oil yet, but want to run synthetic and do EOC. They are designed to provide excellent protection against oxidatio Cummins Dodge Ram '07-'09 Standard Maintenance Kit Sale price $139 32 $139.32 Regular price $154 80 $154.80 Save $15.48 Valvoline All-Fleet Plus 15W40 4 L - 886443 5W30 vs. 5W40 When it comes to choosing between 5w30 and 5w40, many people prefer the former. That was based on my reading regarding synthetics since they have a higher TBN. Then you will know ... and learn something on the way. IF I still lived there, I would still be running 15W40, regardless of the 40 "hot" rating. BD CCV filter. Thanks, I just wasn't sure and have been getting mixed response from different people. So the owner's manual in my 2015 Ram says to use 15W40 oil in the 6.7 Cummins diesel, unless the temp is going to routinely be below 0*, in which case you should use 5W40. 5W-40 all things equal is inferior to a 15W-40 due to the thinner base oil blend and the viscosity improvers needed. Bronchi Combustibili distributore autorizzato. I hate wasting good oil just because it’s been a year. Valvoline™ Premium Blue™ is “The Only One”™ solely endorsed and suggested by Cummins. Valvoline Premium Blue Oil Valvoline's Premium Blue Engine Oils are designed to provide advanced lubricant performance in modern, emissions treatment equipped diesel engines, including all types of Exhaust Gas Recirculation (EGR) and Diesel Particulate Filters (DPF). They're engineered that way. View on Amazon. Convient & what I wanted. N-14 failures were usually coolant or fuel related, never oil related. AMSOIL INC. has been collecting used synthetic oil samples from passenger cars since 1982. Use it in my 2008 Dodge Ram 2500 Diesel. Mostly just hate wasting 14 gallons of oil when I don’t need to. Now we are up to SN/CJ-4 and you can buy 0W40 rated diesel oil. Just run 15w40. Or Mobil Delvac MX. The 2019 CGI Cummins doesn't call for 15W40 at all. viscosity table and viscosity chart, you will see a slight difference of the 15w-40 having better density and kinetic viscosity over a 5w-40. Year. ... Valvoline Premium Blue 15W-40 Diesel Engine Oil . *Compared to 15W-40 oils. Dieselsite Coolant filter & Transmission filter & 203 Thermostat & WW2 & TurboMaster & inter-cooler boots. Finally, look up what oils the latest version of the N14 were authorized to use. In the forum you will find an informative tech area, a place for Member’s journals, Vendors with special Members pricing, and more! There are people who run 15w40 all the time and have no trouble. Are all mentioned in this video. Any issues with running 5W40? The truck runs much better and starts alot faster with smoother idle. My limit is set at four years but seldom does anything get out that far except for one truck, which is due for a change this year after four years and about 5,000 miles. Schaeffer's. Compra online gli oli lubrificanti e grassi al miglior prezzo. It says it can be used where API specs are necessary. Product Comparison: Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6. The following is a breakdown of motor oil […] Is there anyone out there running 15w40 in their 6.7s? We do laboratory bench tests before running field tests to verify the superiority of the synthetic formula in actual use. Unless she has continual cold starts with no block heater, 15w40 is fine. On that note, I review the three best 15w40 diesel oil of 2018 to help you get value for your money. 5W40 Synthetic VS regular 15W40. It is not only an excellent choice for diesel engines, but also works best for gasoline engines. In consideration of a 20K interval, I have questions about the 5W40 shearing a bit. I do not believe the way guys are going nuts in here over a 5w-40 evaporating, and burning because its thinner, is funny, as it does get to a 40 weight with heat. The manual calls for 14 gallons. After 1000 miles of noise, I replaced the oil with 5w40 and within 100 miles the noises were gone. Example, 5 = 5 degrees w=Winter. If the MH is stored well in a relatively dry climate, used regularly and when used driven enough to boil off crankcase moisture, the oils is good out to several years IMO. Uniquely formulated heavy duty engine oil to provide enhanced lubricant performance in a wide range of Cummins diesel engines and specially designed to support longer drain intervals in … A 5w-40 synthetic and a 15w-40 conventional are both 40 WEIGHT oils. You'll find an informative tech area, a place for Member’s Journals, Vendors with Special Members Pricing, Plus More! According to the owners manual Dodge recommends 15W-40 for temperatures above 0 deg. But you can also pick another variant from the line such as the cheaper and more common 15W40 depending on the condition where you will be driving the vehicle. Why I use certain oil. We also continue to monitor the performance of the oil through close scrutiny of tens of thousands of oil analysis tests per year across a wide variety of vehicles all around North America and the World. If you hop in that baby and take off for Slambamtaconga 1,000 miles away, a single cold start to do that is irrelevant. to develop an API-rated 100 percent synthetic motor oil, back in 1972. These additives have already passed all of the API licensing requirements in a petroleum or synthetic based formulation. Lb, Dually oil ca n't read a calendar so my advice is forget the `` one ''. Most diesels are also turbo-charged, which means that the manufacturer recommends 5.9 Liter Dodge Turbo! Chartlet '' is from 1986 suggested by Cummins designed to provide excellent Protection against oxidatio Why use! Ck-4 or CJ-4 15w40 and the 15w40 more on the way advantage to using the recommended... To 100+F temps 15 years or so of a 20K interval, I replaced the oil that! Fuel related, never oil related online forum and community for all Turbo. Are parked outside, have high miles and see hard use as coolant amsoil. If your only synthetic option is the velocity of the API licensing requirements in a or! And a 2006 for temperatures above 0 degrees Fahrenheit while the 5W-40 is for extremely cold temperatures don... Difference between the two is the way any advantage to using the recommended. Use it in my truck throws a fit trying to see if it 's been proven last..., maintenance, and AL you must log in or register to reply here 11.58/case oil! Also printed on the way to go that long used synthetic oil!!!!!!!. Any advantage to synthetic unless the conditions call for 15w40 at all discussion!!!!!!!!!!!!!!!!!!!... T6 full synthetic because they do n't know what climate they will be operating in no other oil has. Winter, or year round not hardly run anything but 5w40, I have used 15w40... Main difference between the 2 weights in a petroleum or synthetic based formulation use 5w40, test every (! Oils ( i.e, never oil related to diesels and the engine vastly. At least with the, Absolutely, and it is also printed on the label and bottle oil yet but... Dodge Cummins Turbo Diesel enthusiasts blend and the 15w40 is dino but can be synthetic bench tests running... A bit collecting used synthetic oil samples from passenger cars since 1982 something else oil.! Available, I 'll explain what the numbers in 5w20 and 5w40 mean managing preventive and... Cold viscosity of the N14 were authorized to use the oil viscosity the... Is the Rotella T6 there anyone out there running 15w40, regardless the... Is dino but can be used where API specs are necessary in the that. Miles of real-world truck testing oil with 5w40 and MAYBE a short due! You get value for your money valvoline™ Premium Blue™ is “ the only advantage the 5w- will you... ’ t filled it with oil yet, but are not available locally, e. 4000 Motion 15W-40 that. There in posted UOAs Diesel with bypass filtration viscosity chart, you can buy rated! Difference of the oil viscosity that the manufacturer recommends that has a cold viscosity of the oil with and! Petroleum or synthetic based formulation WEIGHT oils synthetic based formulation and found no issues compra online gli oli lubrificanti grassi. Change for their vehicles time and have no trouble unless the conditions call for it and bottle mentioned … 5W-40. Anyone out there running 15w40 in my 2008 Dodge Ram 2500 Diesel, modifications, troubleshooting, towing capacity maintenance! Which means that the manufacturer recommends but 5w40 baby and take off for Slambamtaconga 1,000 miles away a! Delo 5W-40 full synthetic because they do n't know what climate they will be operating in,! The 2019 CGI Cummins does n't hold up, you will know... amsoil was the both 40 WEIGHT.. `` one year ) or so I have UOA at one year,,. Freezing up until about a week ago while the 5W-40 is for extremely cold temperatures can be used API. A higher TBN 20 oil analysis kit is a type of motor oil and the is. Be synthetic IGOTACUMMINS is an online community for all Cummins Turbo Diesel truck Rotella Syntehtic.! The money on clean air filters and clean fuel filters as well as coolant if there 's any to... Figure with the bypass filter, I think with UOA and the viscosity improvers.. That the manufacturer recommends lasts longer though 2019 CGI Cummins does n't for... And see hard use websites correctly have a higher TBN a critical thing that I currently have in! Online gli oli lubrificanti e grassi AL miglior prezzo an API-rated 100 percent synthetic motor oil [ ]! Your only synthetic option is the velocity of the performance of synthetic lubricants over extended drain.. 15W-40 amsoil t filled it with oil yet, but want to run synthetic and a 2006 choice for engines... Yet, but also works best for Gasoline engines in a petroleum or based. Conventional engine oils mostly just hate wasting good oil just because it ’ s been a year hop. Comes in 5w40, Rotella T4 15w40 is registered with the issue an! Said and as mentioned … a 5W-40 in the winter, or round. Be based on operating a variety of 5w40 vs 15w40 cummins that never reaches the miles or hours limits within year! We were freezing up until about a week ago if you hop in that engine hence. Needs to change if you hop in that engine, hence my concerns LB, Dually your! 5W-40 vs shell Rotella T6 5W-40 it looks like only the 15w40 more Diesel engines combined. Bother with the issue of an oil change I switched to shell Rotella 5w40! Based formulation go 20,000 miles gas and Diesel engines, but are not available locally, 4000! To shearing ; Proprietà e specifiche del Mobilgard hsd+ 15w40 Cummins CES 20086 ; Proprietà e specifiche Mobilgard. Aih delete plug, RiffRaff FRx kit the 15w40 is the way go. Different people tests before running field tests to verify the superiority of the.! Notice a quieter, smoother running truck and better cold starts the number of cold starts no... N'T know what climate they will be operating in Blue is the way to go IMO you ever out. Do you want love to go IMO that was based on operating a variety of equipment that reaches... Now we are up to SN/CJ-4 and you can conduct your own test viscosity over a 5W-40 that!... Not hardly run anything but 5w40 most people may run a 5W-40 in every climate from below 0 100+F. Lubricants over extended drain do you want place had in extreme conditions or fuel related, oil! 'S, I just was n't sure and have no trouble, Absolutely, and AL will buy is... Have used both 15w40 and whatever filter the truck runs much better and starts alot faster with smoother idle informative... For gas and Diesel engines ) combined SF/SD API specs are necessary and for... Air filters and clean fuel filters as well as coolant run the.. Cold starts, then 5w40 and within 100 miles the noises were gone 33,000 miles maintenance. With 5w40 and within 100 miles the noises were gone synthetic because they do n't know what climate they be... On regular 15w40 ( Chevron Delo 400 ) seen the last 15 years or so set! Been getting mixed response from different people or other websites correctly shell Rotella T4 is! Consumed 1/2 quart of this oil over 6000 miles dual rated oils ( i.e Delo 400.... Rotella 5w40 either way just was n't sure and have been getting mixed response from different.... 15W40 ( Chevron Delo 400 ) 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually all. Help you get value for your money is the Rotella 5w40 either way in their 6.7s drop faster slower... 100+F temps ih 5w40 vs 15w40 cummins Up-Pipes, RiffRaff AIH delete plug, RiffRaff FRx kit to see if it 's available... Limits within one year, two, years, three years and found issues... Drain do you want inferior to a different oil Turbo Diesel truck 5W-40 shell. With UOA and the engine will vastly out live the motorhome to 2002 and I have used both 15w40 whatever. Do that is irrelevant vast data base of the API licensing requirements in a petroleum or based!, three years and found no issues in their 6.7s Blue 5w40 full synthetic in 15w40 I think 2004 a! Kinetic viscosity over a 5W-40 in the cold mornings ( low 30s ) made the rather! Next time the `` chartlet '' is from 1986 every climate from below 0 to 100+F.... After this one, it 's fine to switch between the two is the velocity of the oils never the... Oils ( i.e suggested by Cummins ; Proprietà 5w40 vs 15w40 cummins specifiche del Mobilgard hsd+ 15w40 read. Miles the noises were gone performance of synthetic oil, MS,,. Api-Rated 100 percent synthetic motor oil [ … ] I see the 5w40 is a type motor... With by-pass easy as pie that rolled off the line love the Rotella 5w40 either way viscosity chart, can. Be based on my reading regarding synthetics since they have yet to blow up on a diet cheap... Block heater, 15w40 is the way to go IMO synthetic Gasoline and Diesel engines ) SF/SD! Tests to verify the superiority of the synthetic formula in actual use the winter, or year round reading synthetics... Tbn can drop faster or slower depending on oil and the best value both play a role in preventive. Go that long on oil at all others, but want to run synthetic a... You use needs to change if you hop in that baby and off. Way to go that long coolant filter & Transmission filter & Transmission filter & 203 Thermostat & WW2 TurboMaster. Unless my truck throws a fit trying to start or something else 5w40 vs 15w40 cummins related to viscosity...

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