what gasoline octane rating is best for a 1980 C3 corvette?
Hello I just bought a 1980 C3 Corvette L82 automatic with 38k original miles. My mechanic and others state to put in 93 octane to help keep it clean and run longer. My original owners manual states 87 octane! I have tried 93 premium, 89 middle, and 87 regular and have not noticed any difference in the vette's performance? I have read arguments both ways on what gas to use. Does anyone have a definitive answer? The price of the gas is not important to me as much as keeping my car running longer, thanks!


