Originally Posted by Shmoo
Yeah, that is definitely detonation. Did you put cheap gas in it? That looks terrible.
The walls look fine but new pistons and valves are in your future if you plan on salvaging it.
No I always used 92 octane. The thing is, everything on the motor was fine for the first 5 months, then one day it started burning 1-2 quarts of oil every 250 miles and gettin horrible gas mileage. Why would I need new pistons??? They look fine, a little carbon build up but thats it??