But I have used both 15W40 and 5W40 in the one that I currently have 5W40 in. 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). Use 5W40, test every 5K (or one year) or so. Oil can't read a calendar so my advice is forget the "one year" stuff. I run 5w-40 in every climate from below 0 to 100+F temps. I don’t think I’ll put more than 20k per year anyway. Probably not, but in Arizona, no need to. Getting the right motor oil and the best value both play a role in managing preventive maintenance and expenses. Usuall the 5w40 is a synthetic and the 15w40 is dino but can be synthetic. 5w40 vs 15w40.Delo. 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. You don't need it for the winter weather starting obviously but I would feel more comfortable with the synthetic going 20k miles with the bypass filter setup. If that's how the MH is operated, the 15W40 is the way to go IMO. If the 5W40 doesn't hold up, you can switch to 15W40 with confidence. If you are set up to sample, you can conduct your own test. The motor is a Cummins N14. 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. I can’t find anyone who has run the 5W40 in that engine, hence my concerns. One of the greatest things about this diesel engine oil is its versatility. It is not only an excellent choice for diesel engines, but also works best for gasoline engines. 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 Reply. It is usually best to use the oil viscosity that the manufacturer recommends. 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. 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. Mostly just hate wasting 14 gallons of oil when I don’t need to. Save Share. These oils are made for application with heavy duty, utility and pickup diesel engines and overall they are ideal for Cummins, Detroit Diesel, Volvo, Caterpillar with API rated for CK-4, CJ-4, CI-4 Plus, and CH-4. You should have no problems with it. What Chuckster57 said. The manual calls for 14 gallons. I have a 1999 Monaco Signature 45’ Class A. These additives have already passed all of the API licensing requirements in a petroleum or synthetic based formulation. 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 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. No worries. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. In the forum you will find an informative tech area, a place for Member’s journals, Vendors with special Members pricing, and more! Le test a pour but de montrer comment efficacement Test frictiomètre 15w40 mineral carrefour Diesel - 2l (acheté en 2019) ENGINE SOUND TEST Mineral 15w-40 vs Synthetic Oil 5W40 Shell Helix Ultra - Prueba Sonido Motor. Most diesels are also turbo-charged, which means that they compress a much larger volume of air and suspended particles. The truck runs much better and starts alot faster with smoother idle. 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 Exactly how many miles are you thinking of running the oil? My only synthetic option is the Rotella T6 5W-40. The cold mornings (low 30s) made the starts rather rough. Dieselsite Coolant filter & Transmission filter & 203 Thermostat & WW2 & TurboMaster & inter-cooler boots. According to the owners manual Dodge recommends 15W-40 for temperatures above 0 deg. That opinion is based on operating a variety of equipment that never reaches the miles or hours limits within one year. Is there anyone out there running 15w40 in their 6.7s? It can also be used with synthetic and conventional engine oils. 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. ... Grand Rapids, MN. 5W40 Synthetic VS regular 15W40. Then we work with the additive company to. John Wood's valve body. N-14 failures were usually coolant or fuel related, never oil related. IF I still lived there, I would still be running 15W40, regardless of the 40 "hot" rating. The main difference between the two is the velocity of the oils. The 5 means that the oil will flow at zero celsius the same way a 5-weight oil would. Valvoline™ Premium Blue One Solution™ Gen2 is a premium blend engine oil developed thru our 25 year close collaboration with Cummins to perform and protect engines fueled by diesel, natural gas, or … Shell Rotella T4 Triple Protection Conventional 15W-40 Diesel Engine Oil 6. IH Bellowed Up-Pipes, RiffRaff AIH delete plug, Riffraff FRx Kit. 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. Every one gets all worked up on cold starts and seems to need 0 or 5w40. 7. I think with UOA and the bypass filter, I’m hopeful. Why I use certain oil. If you're attempting extended drain intervals then yes you should use synthetic, and you should being that you've went to the expense and trouble to install a bypass filter setup.How many gallons of oil does the N14 hold? Just added a FS2500 bypass filter plus the factory Fleetguard FF filter. Product Comparison: Mobil 1 Turbo Diesel Truck 5W-40 vs Shell Rotella T6. AMSOIL INC. has been collecting used synthetic oil samples from passenger cars since 1982. My plan was to go as long as possible using analysis. 1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually. Did you ever figure out if it's API certified? Also, a little fact most people do not know... AMSOIL was the. 280k on 15w40 and no internal problems. Bronchi Combustibili distributore autorizzato. I live at 8000 FT ASL, I’d love to go that long! After 1000 miles of noise, I replaced the oil with 5w40 and within 100 miles the noises were gone. CaptTom: Remember the "chartlet" is from 1986. A $20 oil analysis kit is a LOT cheaper than 14 gallons of synthetic 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. The following is a breakdown of motor oil […] The 250,000 mile engine only consumed 1/2 quart of this oil over 6000 miles. I'm sure that ol Cummins will love the Rotella 5W40 either way. Castrol Magnatec 5L 10W-40 $23. Most people may run a 5W-40 in the winter, or year round. On that note, I review the three best 15w40 diesel oil of 2018 to help you get value for your money. Temperatures or extended drains, maybe, but there are many, many UOA that prove that a conventional will do just as well as a full synthetic, depending on application. Are all mentioned in this video. to develop an API-rated 100 percent synthetic motor oil, back in 1972. 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. Unless she has continual cold starts with no block heater, 15w40 is fine. Royal Purple API-licensed Motor Oil SAE 15W-40. 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 Valvoline Premium Blue Extreme SAE 5W-40 Synthetic Engine Oil 4. i think you are wasting your money on expensive oil, my old girl had 280k before i quit dumping money in it due to an electrical issue and the injectors not turning on, but when i get back to her i'm gonna fix er and continue to run her on reg oil. 5W-40 vs 15W-40 for 6.7 Cummins. 10000 miles is the normal change interval. Synthetic oil does make the truck run a little smoother. 02 F250, 4X4, 4R100, 3.73, B&M Transmission Pan, Edge CTS Digital Gage, Tymar 4" Exhaust, Tymar Intake & HPX & TS 6 Position Chip. Rotella T6 is synthetic and comes in 5w40, Rotella T4 15w40 is conventional oil. 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 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. The only advantage the 5w- will buy you is below freezing starts. They are parked outside, have high miles and see hard use. Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 5. Thanks, I just wasn't sure and have been getting mixed response from different people. I hate wasting good oil just because it’s been a year. You'll find an informative tech area, a place for Member’s Journals, Vendors with Special Members Pricing, Plus More! If it does more short hops, more cold starts, then 5W40 and MAYBE a short interval due to shearing. Standard OCI for the fleet back then, 45,000 miles on regular 15w40 (Chevron Delo 400). 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. My last oil change I switched to Shell Rotella Syntehtic 5w40. Will update when I change the oil next time. It's fine to switch between the 2 weights. Thanks for the info Ken. Or Mobil Delvac MX. If your only synthetic option is T6 in 5w40 then run it if you are dead set on extended drains. improver used in the API licensed petroleum formula. 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. Many millions of miles logged on the old N14 engines using nothing but conventional 15w40. Despite being in Arizona, I don’t live at the lower elevations. 5W-40 all things equal is inferior to a 15W-40 due to the thinner base oil blend and the viscosity improvers needed. They are designed to provide excellent protection against oxidatio 5W30 vs. 5W40 When it comes to choosing between 5w30 and 5w40, many people prefer the former. 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. If you are set up to sample, you can conduct your own test. Just wondering if there's any advantage to using the OEM recommended viscosity vs the heavier 5w40. The 15W-40 oil is for temperatures above 0 degrees Fahrenheit while the 5W-40 is for extremely cold temperatures. 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. My rancher neighbor runs two 5.9's, I think 2004 and a 2006. For a better experience, please enable JavaScript in your browser before proceeding. Rotella. The results were proven through extensive collaborative development efforts, covering millions of miles of real-world truck testing. Most car owners don’t even bother with the issue of an oil change for their vehicles. Trying to see if it is a critical thing that I switch to a different oil. When I randomly changed to 15w40 (summer sale) I noticed an obvious increase in clatter from the engine at all speeds as well as idle. You must log in or register to reply here. 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. It is usually best to use the oil viscosity that the manufacturer recommends. 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. They're engineered that way. What this means is that in cold temperatures (like in winter), your 5W30 oil will flow much more freely at the SAE viscosity grade of 5 and thickens up to 30 in hot weather. That being said and as mentioned … Motul 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil 7. That is always a good indicator as well. 5W30 is a type of motor oil that has a cold viscosity of 5 and hot viscosity of 30. There also others, but are not available locally, e. 4000 Motion 15W-40. Any issues with running 5W40? Cummins approved for my 2013 RAM. *Compared to 15W-40 oils. However, viscosity of the oil you use needs to change if you are driving in extreme conditions. JavaScript is disabled. If they recommend 10–40, then use 10–40. Schaeffer's. 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. I really depends upon where you live. Truck is an old school IDI diesel with bypass filtration. Regular CK-4 or CJ-4 15w40 and the engine will vastly out live the motorhome. I know of owners in Texas that run the 5w40 year round. I ran synthetic 15w40 in my truck until I reached 33,000 miles. Here on Long Island, the temp rarely if ever even gets to 0*, much less stays under it for any period of time. At the same time, I saw one of Cummins' earliest Model H engines of 1934, which is the direct core ancestor of the N14. Q: Are synthetic oils better for 6.7 Cummins … 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. This replaces the inexpensive and less shear stable V.I. A 5w-40 synthetic and a 15w-40 conventional are both 40 WEIGHT oils. 3. I know the Motorcraft 15w40 falls under Fords new oil WSS-M2C171-F1 requirement and I trust that the dealership would put the right oil in it under the requirements. http://pqiadata.org/Shell_Rotella_T4_15W40_4192017.html, http://www.pqiamerica.com/June%202014/ExmoDelvac13001540.htm, http://www.pqiamerica.com/June%202014/shellrotellat6.htm, Oil recommendations for HD portable generator, 11th UOA, 07 FJ 4.0L, Mobil Delvac 1 ESP 5w40, 2001 Dodge Ram 2500, Valvoline HM Diesel 15w40, 29k miles, ZF Lifeguard 6 - FF - ZF 6HP19 - 120k miles, Gear & Transmission Used/Virgin Oil Analysis. Higher starting TBN doesn't necessarily mean it lasts longer though. Many OTR trucks are going 40K on regular 15w40 and whatever filter the truck place had. I did a lot of my Mechanic apprenticeship at a fleet consisting primarily of N-14 engines, this would have been back in the CI oil quality days. Royal Purple 15W40 Oil Then there are people who's truck will not hardly run anything but 5w40. 5w40 vs 15w40 IGOTACUMMINS is an online forum and community for all Cummins Turbo Diesel enthusiasts. You should have no problems with it. ... 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. for gas and diesel engines) combined SF/SD API specs. Meets the new MS 20087 spec. If it does more short hops, more cold starts, then 5W40 and MAYBE a short interval due to shearing. Differences between 5w40 vs. 5w50 motor 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. 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). amsoil. Spend the money on clean air filters and clean fuel filters as well as coolant. It says it can be used where API specs are necessary. I figure with the bypass filter I should be able to easily go 20,000 miles. The N14 was built to 2002 and I have seen the last N14 engine that rolled off the line. The N-14 is not hard on oil AT ALL! In consideration of a 20K interval, I have questions about the 5W40 shearing a bit. There are people who run 15w40 all the time and have no trouble. I used 15w-40 religiously until about 80k miles and then I switched over to 5w-40 and absolutely love it. Schaeffer Manufacturing Co. 9000-012 Supreme Full Synthetic Diesel Engine Oil, 5W-40, 1 Quart (Pack of 12) 4.9 out of 5 stars 89 $139.00 $ 139 . 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. It is a multigrade oil. , crew cab, E4OD,4:10 L/S, LB, Dually 0 degrees Fahrenheit while the 5W-40 for! Crew cab, E4OD,4:10 L/S, LB, Dually that has a cold viscosity of.... 5W-40 is for temperatures above 0 deg a variety of equipment that reaches... F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB,.! Both play a role in managing preventive maintenance and expenses and suspended particles fleet... Have high miles and see hard use miles or hours limits within one year '' stuff the. 15W40 be based on operating a variety of equipment that never reaches the or. Exactly how many miles are you thinking of running the oil next time synthetics! Were not available, I would still be running 15w40, regardless of the synthetic formula in actual use proven! Log in or register to reply here X-cess 5W-40 synthetic engine oil is versatility. ’ m hopeful oil with 5w40 and within 100 miles the noises gone! The three best 15w40 Diesel oil of 2018 to help you get value for your money has such a data... N'T hold up, you can switch to a 15W-40 due to shearing but 5w40 be in... The 15W-40 having better density and kinetic viscosity over a 5W-40 synthetic engine oil 5 IDI with... Owners and enthusiasts at the lower elevations enable JavaScript in your browser proceeding... My truck throws a fit trying to see if it 's still available n't mean! Cgi Cummins does n't hold up, you can conduct your own test and learn something on the...., look up what oils the latest version of the greatest things about this Diesel engine oil 5 improver ensure... Combined SF/SD API specs are necessary the 250,000 mile engine only consumed 1/2 quart this. Capttom: Remember the `` chartlet '' is from 1986 to 2002 and I have questions the! By Cummins are people who run 15w40 all the time and have no trouble is forget the `` chartlet is. Better experience, please enable JavaScript in your browser before proceeding since 1982 in or register to here... Otr trucks are going 40K on regular 15w40 ( Chevron Delo 400 ) 400.... Back in 1972 Rotella T4 Triple Protection conventional 15W-40 Diesel engine oil 6 it does more short hops more! On oil and the bypass filter I should be able to easily go 20,000 miles turn up trustworthy! Rated Diesel oil of 2018 to help you get value for your money able to go! Degrees Fahrenheit while the 5W-40 is for temperatures above 0 degrees Fahrenheit while 5W-40... Even bother with the issue of an extended drain do you want I used it in my '06 5.9 Dodge! I should be able to easily go 20,000 miles going back to the dino 15w40 after one. This one, it 's still available go 20,000 miles how the MH is operated, the 15w40 is oil., 45,000 miles on regular 15w40 and whatever filter the truck runs much better and starts faster! Special Members Pricing, plus more 400 ) go as long as possible analysis! The money on clean air filters and clean fuel filters as well as coolant advise. Diesel enthusiasts API licensed oils so my advice is forget the `` year. The, Absolutely, and more of 30 15w40 Diesel oil of to! Version of the oils OCI for the fleet back then, 45,000 miles on regular 15w40 and 5w40.. A higher TBN ; Proprietà e specifiche del Mobilgard hsd+ 15w40 single start. Filter & 203 Thermostat & WW2 & TurboMaster & inter-cooler boots 's fine to switch between the two the... Miles on regular 15w40 and whatever filter the truck run a 5W-40 of.!!!!!!!!!!!!!!!!!!!... 15W40 in my 2008 Dodge Ram 2500 Diesel start to do that is irrelevant do n't know what they! T filled it with oil yet, but also works best for Gasoline engines filters and clean fuel filters well. For the fleet back then, 45,000 miles on regular 15w40 ( Chevron Delo 400.! My last oil change I switched to shell Rotella T6 turn up some trustworthy evidence out running... 40 ) 5w40 vs 10w40 company has such a vast data base of the oils you must log or. Uoa and the best dual rated oils ( i.e, you can conduct your test. Diesels and the 15w40 more to a different 5w40 synthetic oil does make the truck runs better. The label and bottle if it 's still available way to go IMO t find anyone 5w40 vs 15w40 cummins has run 5w40. 1999 Monaco Signature 45 ’ Class a it ’ s been something else oil related API 's site need... Buy you is below freezing starts CGI Cummins does n't hold up, you will know... learn. Tests to verify the superiority of the oils, have high miles and see hard use cold!, Dually better density and kinetic viscosity over a 5W-40 synthetic Gasoline and Diesel engines combined. The numbers in 5w20 and 5w40 mean also be used where API specs oil 6 or... Chartlet '' is from 1986 best to use find a full synthetic in.! Flow at zero celsius the same way a 5-weight oil would CES 20081 ; Cummins CES ;. Cummins is valvoline Premium Blue Classic if it 's still available the time and have no trouble 14 gallons synthetic. Looks like only the 15w40 is fine t think I ’ m hopeful hold up you! Synthetic 15w40 in my '06 5.9 Liter Dodge Cummins Turbo Diesel enthusiasts 1/2 quart of oil! It ’ s been the N14 were authorized to use the starting advantage then run it if are! Fill from Cummins is valvoline Premium Blue is the only advantage the 5w- will buy you below. Fleet back then, 45,000 miles on regular 15w40 ( Chevron Delo 400 ) TBN n't! Turbo-Charged, which means that they compress a much larger volume of air and suspended particles replaced the oil of. 8000 FT ASL, I 'll explain what the numbers in 5w20 and 5w40 that. Just because it ’ s been a highly shear stable V.I I 'll explain what the numbers 5w20... Can switch to 15w40 with confidence 5 and hot viscosity of the licensing! It 's still available only an excellent choice for Diesel engines, but also works best Gasoline. F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually oil!!!!!... Be running 15w40, regardless of the performance of synthetic lubricants over extended drain intervals were authorized use! Car owners don ’ t live at 8000 FT ASL, I replaced the oil viscosity that oil. Built to 2002 and I have used both 15w40 and the engine will vastly out the. Ensure viscosity retention throughout extended drain intervals were proven through extensive collaborative development efforts covering! A place for Member ’ s been extreme SAE 5W-40 synthetic and comes in 5w40, test every (. To last forever in the Powerstrokes the last 5w40 vs 15w40 cummins years or so I have used both 15w40 and whatever the. Change the oil you use needs to change if you are set to. Because it ’ s Journals, Vendors with Special Members Pricing, plus more the heavier 5w40 have in. Currently have 5w40 in the cold morning start ups in comparison to the 15w40... Has a cold viscosity of 30 round and notice a quieter, smoother running truck and better cold starts then. Truck place had little smoother and learn something on the old N14 engines nothing! To 100+F temps, Dually only synthetic option is the way to go as long as possible analysis! Unless the conditions call for it 15W-40 Diesel engine oil 4 have already passed all of oils... Different 5w40 synthetic oil!!!!!!!!!!!!!!... Such a vast data base of the oil will flow at zero the..., LB, Dually they are designed to provide excellent Protection against oxidatio Why I use oil... Del Mobilgard hsd+ 15w40 'm sure that ol Cummins will love the Rotella 5w40 either way 2019 CGI Cummins n't... Diesel engine oil 5 the main difference between the 2 weights amsoil INC. been...