higher octane gasoline is for high compression engine. kung stock compression lang, using higher octane than the prescribed in the manual, wala rin gaanong effect.. same effect lang sya sa gasoline with low octane...
kung high compression ang engine, dun kaylangan ang higher octane gasoline..
dahil using low octane gasoline on a high compression engine will cause engine knocking..
http://en.wikipedia.org/wiki/Engine_knocking
ang high octane gasoline ay hindi sya mag cocombust agad agad at high compression..
kapag sa low octane gasoline ay ginamit sa high comp engine, mag cocombust agad yung a/f mixture kahit wala pang ignition,, dahil mataas compression at di kinaya ng low octane gas ang pressure kaya mag cocombust agad kahit wala pang ignition..