1996 Mercury Cougar Support Question
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Question posted by zmccallister2488 on December 12th, 2012
Type Of Fuel
Current Answers
Answer #1: Posted by roadrunnertim on December 12th, 2012 1:13 PM
Big V8 engines definitely run worse with 87 octane. My 440 Road Runner would run terrible with anything less than 93 octane. Higher octane doesn't give you any more power, but it does reduce knocks and pings in an engine that has that problem with lower octane gas.
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at first it was losing power. The car is firing but will not start