I'd take mine straight up.
Why fool around with a synthetic 5W-20?
Voa's are limited. Many "weak" looking oils shine. I bet Syntec may be one.
I would not mix anything with it.
Look at the voa's for Conoco Hydroclear (Motorcraft) 5W-20.
Nothing much shows, but performance is excellent.
Looking at "traditional" additives don't mean spit now. The good stuff doesn't show.
quote:Originally posted by crimsontide:
i have an 03 ford f150, 5.4l......screwed due to warranty
How does that screw you?? I'm sure you are a skeptic, but these will go forever on the thin Motorcraft juice.
Our Navigator has 125K and runs like new on it. No consumption.
I like esters, but I really think you ought to leave the original chemistry alone. Maybe one of our chemists will be able to give you a more technical response.