Quote:
Originally posted by VR4_Craver
so stop being an asshole an educate us "Mr. I-Know-everything-thing-there-is-to-know-is-this-tiny-little-world"
jack the compresion up to like 11:1 in your car and run 89 and then run 91 and tell me you dont notice a difference...
I think that my cr is like 9.5 but i put in 83....im a cheap ass. Does the Type -S take premium(93)? I dont think i have ever thought to ask or look it up before....
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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.