Cummins' only recommendation for oil is use of a 15W-40 weight that is API certified CJ-4 Low Ash oil meeting Cummins Engineering Standard 20081. Oil meeting the CJ-4/CES 20081 oil standard is backwards compatible with previous engines, and therefore is acceptable for use in your unit. All Cummins engines come from the factory containing Valvoline Premium Blue 15W-40 (a synthetic blend); however, we do not endorse any brand of oil. As long as it meets the specifications, it is acceptable for use.
Thank you for choosing Cummins. Have a great day!
Of course Cummins is going to say to use the current oil... if they say anything else, they're basically telling you that the old oil is better (which it is) but the new motors can't use it due to EPA emissions equipment requirements (which is true), ergo your new diesel truck you just dropped $60k+ on won't last as long as the old one you just got rid of... .
Looks bad for business.
From their standpoint WHY WOULD THEY WANT TO STOCK 2 oils inventory costs money.
As long as most run the oil in our trucks, Would there REALLY be a difference??? not that we could see in the lifetime use of our trucks. IMO The only reason that I use the old Delo is cause I can still get it, and why not its FREE.
Well, I sent an email to Cummins, and this is what I got back.
Im now completely confused. So, I guess what Ill do is either just continue on with plain old delo, or start using a synthetic. Rotella ?
Why would you be confused? I'll make you a bet that your original 2002 owner's manual prescribed ordinay dinosaur oils and advised that additives are unnecessary and not recommended back in 2002 when you bought the truck and still contains the same words today
The confusing part is that the oil today is not the same as it was in 2002. If you buy a new truck today, you cannot use the same oil as was on the market in 2002.
John Martin said:Low SA (less than 1 percent weight) effectively places a limit on the amount of detergent which can be used in these oils. But diesels love detergents. In over 25 years of inspecting various diesel engines in the field, I've yet to see one which didn't perform better on oils with higher levels of detergency.
Low P means the Feds placed a limit on the amount of Zincdithiophosphate (ZDP) additive which can be utilized. ZDP is the most effective oxidation inhibitor and anti-wear agent currently available. Additive manufacturers are now forced to use more expensive and less effective ashless oxidation inhibitors and anti* wear agents.
Low S means the new oils can't rely on some of the least expensive Sulfur-based oxidation inhibitors they used in the past. And, once again, many of the new ashless oxidation inhibitors haven't been thoroughly field proven in heavily loaded trucks. Low S means more highly refined base oils, which is a positive thing. Average base oil quality is now significantly improved.
The confusing part is that the oil today is not the same as it was in 2002. If you buy a new truck today, you cannot use the same oil as was on the market in 2002.
Uhhhhh, I guess that's true but so what? New oils designed and produced for the new engines are sold everywhere. The new oils are also backward compatible for older trucks.
Uhhhhh, I guess that's true but so what? New oils designed and produced for the new engines are sold everywhere. The new oils are also backward compatible for older trucks.
My 5K oil analysis is coming back virtually identical with the new oil as with the prior CI stuff.