Hey, I have a 54 chevy 3800 with a 1957 235 engine in it. I tested it for compression and had at a maximum of 90 psi. The other three cylinders were pretty bad at 45,40,75psi. I put oil in the problem cylinders and the compression shot up to 100 psi. Does this mean I have bad piston rings? If so would I have to rebuild the engine or get it machined. I'd rather not spend 1000's at a machine shop if I can help it.
Let me know what you think.
