quote:
Originally posted by mikep:
quote:
Originally posted by mf150:
Yup, I guess so. I just haven't seen anything that makes me comfortable enough to put it in my own vehicle.
Have you looked at any of the UOA threads on the various 5w-20s? If so, please tell me what you saw that made you feel uncomfortable about using them.
Not trying to be a smart a$$ just wondering if there was something in those reports that I didn't catch or understand.
Mikep
Hey Mike--
I've run Mobil 1 10W30 in my 97 F150 Lariat. When my F150 hit 200,000 miles I had a compression check done. The compression check came back with suprising results: virtually no wear out to the engine! This is the real world proof that makes me comfortable.
UOAs are done in a lab setting, but there are too many variables for me to say with confidence that the viscocity/brand is "the best for my vehicle."
I figure I'll stick with something that I know works with my driving style. For me it hapens to be 10W30 Mobil 1.
There is probably nothing wrong with 5W20, but the fact that Ford came up with it as a recommended viscocity and didn't give us a reason makes me skeptical. I believe Ford's only reason for 5W20 weight oil is for CAFE reasons.
NOTHING mechanically has changed since 97 when 5W30 was recommended, and nothing has changed mechanically in our modular engines sing the early 90s when 10W30 was recommended.
Call me old fasion, but virtually no-compression loss on a 97 Lariat with 206,000+ miles makes me feel one heck of a lot mor ecomfortable than seeing any UOA.