15W40 why?
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Tuned
Joined: Nov 2003
Posts: 454
Likes: 8
From: CT
15W40 why?
Okay a stupied question from someone who doesn't really deal with diesels,
Why is using a heavy 15W40 so important? Why can't you use a lighter weight oil? I was thinking beause of the HP and torque and turbo, but there are gassers out there that compare in that catagory and use lighter weight oil...so I am just wondering. I know the oil is related to the FI and thought that may be it.
What is the difference between a oil meant for diesel and one meant for gas?
Why is using a heavy 15W40 so important? Why can't you use a lighter weight oil? I was thinking beause of the HP and torque and turbo, but there are gassers out there that compare in that catagory and use lighter weight oil...so I am just wondering. I know the oil is related to the FI and thought that may be it.
What is the difference between a oil meant for diesel and one meant for gas?
Elder User
Joined: Aug 2004
Posts: 586
Likes: 0
From: Schwenksville,Pa
Our diesels come from the factory with 10w-30. I, along with many others use 5w-40 oil which is thinner when cold. I think the main difference between C rated and S rated oil is the additive pack. Diesels produce more soot which must be held in suspension in the oil.
