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Originally Posted by parkav93
The reason is that that supercharger is trying to pump a heck of alot of air into the cylinders and the pistons can't speed up as fast as the incoming air is trying to get them to do because of the slower firing time of the low octane fuel. Therefore the engine has to work too hard to meet the demands of the supercharger and that causes stress on all of the moving parts of the engine. The valves will chatter very loudly in this kind of excelleration which causes alot of wear on them. Basicly you will damage the engine if you do that alot. Also the engine is disigned for the premioum fuel so the fuel injectors would become clogged alot faster.
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Low Octane gas burns faster that high octane gas. octane is the gas ability of the gas to resist combustion (or self combustion , ie, detonation). Higher octane gas combusts slower and can be squeezed more before it self detonates. Thats why higher compression engines (or engines which squeeze more gas into the cylinders-higher cylinder pressure) needs high octane gas. to prevent the gas from self combusting before the spark plug fires it off.
octane has nothing to do with valve chatter (valve chatter is more than likely detonation which sonds like a bunch of marbles in a tin can) and higher octane gas does not keep injectors cleaner unless the gas company puts some sort of injector cleaner into the gas.