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#13 | |
Moderator
Join Date: Feb 2002
Location: Az
Age: 44
Posts: 3,804
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Quote:
the octane rating is the measure of a fuels abiltiy to resist pre-ignition. the only reason you may gain power from running a higher octane is that when running a lower than optimum octane fuel it causes pre-iginition or knock, most modern cars have knock sensors, when they detect the knock they tell the ecu which then retards timing consequently decreasing power, and allowing you to skate by with cheap gas and not harm the engine. then when you stop being a cheap ass and run the higher octane stuff the ECU will go ahead and advance the timing to where it should be. therefore you do not gain power from running a higher octane, you just lose power by running low octane. |
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