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Old 06-09-2001, 07:40 PM
william rogers william rogers is offline
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Join Date: Jan 2001
Location: oregon
Posts: 2,013
Most people don't relize that the lower the octane the gasoline the more volitile it is ,high octane gas has a retarder in it hence it can be compressed more (higher compression ratio engine) thus giving more power on the down thrust of the piston and with a longer burn.So when you use the more volitile fuel(low octane) in an engine with high compression it flames guicker causing what you hear as pinging, and can do real damage to pistons over the long run.So the proper way to combat the problem is to use the right octane macthed with the factory spec timeing. I reilize that the newer cars do some weird timeing tricks with the computer ,but that is beyond this old codger ...
William Rogers........
74 240D, 81 300 SD. 81 hot rod 2wd Blazer (454) 2 year project...........
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