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1036 Views 4 Replies 4 Participants Last post by  SwissCheeseHead
My owners manual is missing so what is the recommended weight oil for the Motor and Diff?

Also if you guys have like a "golden formula" with brands and what not I'm curious as to what you guys run for engine oil, ATF, and Diff oil.

Its a 4 speed auto.

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There are a few ways to find out:

1) Search this forum- there are numerous threads on this subject
2) Search for a downloadable version of the Bentley manual. This will provide you with the correct weights and approved oil grades/types for your engine. Also included is a scale of weights depending on what climate you're in.
3) Search for "Bob is the oil guy" on a search engine. Tons of information on that site.

Good luck on your search.

Sent from my Droid Incredible
I use 10w40 in the winter and 20w50 in the summer. The older engine(m30) does needs the thicker oils compared to the newer engines.

I just put Mobile 1 High Mileage 5W30 in preparation for the cooler weather coming up. Got it a wally world for $26 for 5 QTs.
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