Well, no amount of
oil would have fixed this.......
This is the 25 PSI piston, and what's left of the top compression ring. I've also got a wiped out lifter and cam lobe just for good measure......
The piston is bent down below the top ring groove and looks fine from above. It may have been like this since it's last rebuild 30,000 miles and 15 years ago. It did not do any visible damage to the bore, but it's going to a machine shop to get checked by someone who (I hope) knows what they are doing.
-Jon