oil

[hrsedrvr]

looking for info about synthetic oil for duramax
is is worth it? what are pro's/ con's?

[jmac5058]

Do a search,this subject has alot of threads on it.

[Mark Rinker]

I like Mobil Delvac - both conventional (black jug) and synthetic (silver jug).

I dislike Rotella, in any form, at any price.