When should I start using synthetic oil??

[1stToyota]

Originally Posted by bronsin

Synthetic oil was delveoped for use in jet (gas turbine) engines where operating temperatures exceed 400 degrees F. Since internal combustion engine temperatures are less than 200 degrees F synthetic oil is not needed. Marketing types saw the need people have for "something better" than the next guy and started the hype.

If it's not needed in cars, just jets, a UOA result will be no better than dino, always, because it's just hype and an overkill to use synthetic...or it does provides better protection and will almost win in a UAO showdown...