Forum Discussion
gmcsmoke
Jul 19, 2013Explorer
Cummins12V98 wrote:
gmcsmoke wrote:Charlie D. wrote:
My 2013 owners manual says nothing about semi or full synthetic oil. It does state to use 15w40 CJ-4.
Your manual says to use 15w-40 zero and above which is dino oil. It also says to use 5w-40 below zero which is a synthetic oil
So you don't think there are any 15-40 Synthetic oils?
perhaps you should go back and reread. The original statement noted nothing in the manual stating the use of semi or full synthetic oil. I pointed out the manual recommends using either dino and full synthetic based on environmental conditions.
but you can spin it however you'd like.
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