I had a few engines break for reasons not related to oil failures. What I noticed was the broken parts were always a lot cleaner on the motors that ran synthetic. <img src="/forums/images/graemlins/oink.gif" alt="" />

Seriously, I saw a lot less deposits around the piston rings. No noticeable wear differences, but defiantly cleaner.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...