Originally posted by AliasJerk:
You shouldnt ever switch to synthetic, a synthetic oil should ONLY be used from the start of the car, less then 10K miles. Or else it WILL leak. I Suggest you use a Synthetic BLEND, you can use that at any time, and you dont have to change as often , and it makes the engine run cooler preventing wear and making the engine last longer.

I switched to synthetic at 120k!

97 Mystquie GS - I4 ATX died at 168K 94 Pontiac Crap AM SE - 2.3L I4 5spd 2002 Mazda Protege5 - 2.0L ATX