I have even read most of the statements on this thread, and I have one major problem with running the exotic fuels....they obviously precipitate oxygen during the combustion process! All IT motors I know of are limited by the intake....that is, only so much oxygen can be introduced to combustion chamber...that is what limits horse power. If these 36$/gal fuels can make about a 5% increase in spec Miata power, they must be introducing oxygen into the combustion process....THAT IS ILLEGAL WHETHER OR NOT THE FUEL PASSES TECH!!! My O2 cents worth. Chuck