The other day my friend told me he was running high octane fuel in his everyday car to clean it out, (Which I'm pretty sure it doesn't clean it out) and I have been told that it can burn your valves up. So I warned him and he said that is was fine to run high octane so I looked it up. I was always under the impression that the octane rating was the explosive potential of the fuel, but it's actually a rating on how much compression the fuel can take before ignition. So since two stroke engines run at much lower compression than 4-strokes wouldn't high octane fuel be a waste of money? There's probably something else that factors in that I couldn't find, but maybe we'll all save some money now!