yotasales said:My '05 DC TRD Pre-Runner has 65k miles on it. Anyone know if switching to Mobil 1 synthetic would be bad? I've heard that it shouldn't be done with high mileage vehicles, not sure if I consider 65k on a Yota "high" mileage.
I think it is true that switching to syn oil could REVEAL faulty oil seals (varnish and/or sludge keeping them from leaking) but syn oil will not CAUSE oil leaks.yotasales said:Well, maybe it's just an urban legend but I've heard switching to syn. after a lifetime of reg. can cause oil leaks.
I think I'll do it.