http://en.wikipedia.org/wiki/Octane_rating
http://auto.howstuffworks.com/fuel-e...question90.htm
http://chemistry.about.com/cs/howthi.../aa070401a.htm
Time to read some real facts. You'll find: The amount of fuel in a given volume may have more energy value but combusts at a different temperature than the same volume of fuel with a different rating. It's not the octane level of a fuel that cleans your engine but the additives. Using a different fuel than your engine is designed for is actually less efficient in terms of power produced, fuel burned and money spent.
Enjoy!