AP9
Well-Known Member
- Joined
- July 23, 2012
- Messages
- 251
- Reaction score
- 5
- City, State
- Chicago SW suburbs
- Year, Model & Trim Level
- 2000 XLT 4WD, 4.0L OHV V6
A certain retailer is currently offering a sale & rebate in which I could purchase 6 quarts of Mobil 1 0W-40 synthetic oil for just under $30. I've read that M1 0W40 is a top-of-the-line oil and is a "true" Group IV oil. Now I am not having any problems with the engine besides a very minor leak from what I believe is the rear crankshaft seal. Just wanted to see who else out there has successfully run 0W40 in their OHV V6. Regardless of what Ford says, I don't feel comfortable putting 5W-20 in, but on the other hand I wonder if the 0W-40 would be a bit too heavy at operating temps.