Ok
I have been all over this board trying to find the proper weight of MOBIL 1
The book says 15w-40.workhorse chassis on a '04 adventure 35u..
but posters say thats no good for the 8.1L eng
others say 5W-30 mobil-1......is fine
seems like a big difference......
what would you guys reccommend?
thanks
Ill get this thing done some time!