J2
Junior Member
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To discover, you must lose sight of the shore
Posts: 55
Raleigh, North Carolina
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I am not a chemist, but I had the opportunity to ask one about octane and its effect on motor fuel. He told me that higher octane does not necessarily burn cooler or result in less deposit. Higher octane, he said, tends to suppress pre-ignition, so that the engine does not "ping," which means the fuel does not fire in the engine before it is supposed to fire. Higher compression engines need higher octane fuel because they tend to pre-ignite. These lil Suzys are not high compression engines, and the owner's manual specifies 87 octane fuel. I run 89, simply because it seems to my ear to run a little better.
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