quote:Originally posted by Trajan:
And Ford, et al, doesn't require an UOA for warranty. All they require is that you follow said warranty conditions.
Agreed. AFAIK, as long as you follow the car mfg OCI you don't need a UOA or anything special. Just proof that you bought a mfg approved spec'd oil and the proper filter. Simple just follow directions, and enjoy your wheels.
If API certification, the proper grade of oil, and the recommended interval didn't matter then the OM would most likely read something like this. Add what ever oil you want, run it as long as you want, just keep it full.