quote:Originally posted by Ebolamonkey:
Synlube is brought into consideration because you representing Amsoil knocks on all the "inferior" oils and since Synlube claims to be better than oils that need changing it is then the "superior" oil to Amsoil.
No oil really needs to be changed until it can no longer perform it's functions. A used oil analysis can determine this. However, most oil warranties (except AMSOIL) will put a limit on mileage or time even with a UAO. Some have gone as high as 400,000 miles on an AMSOIL oil change.