I've been thinking about how much to worry about the compression on premium pump gas. I have a 350 chevy iron headed stock engine in a truck with 10.25 compression. Actually, it is bored 040 over so it is slightly higher. It was a 300 hp engine out of a corvette. I never ping and have run the engine for years without issues. I have heard aluminum heads are good for about 1 point in compression so I should be good up to 11.25?
