Higher Octane Fuel
Burns slower, has more energy content per volume but only be taken advantage of by higher compression engines.. Someone running 8.5 to 1 compression won't benefit power or mileage wise from 94 octane versus 89 octane other than the fact that the higher octane usually burns a little bit cleaner but that isn't really a reason to pay for it.
http://www.torquecars.com/articles/fuel-octane-ratings.php
Burns slower, has more energy content per volume but only be taken advantage of by higher compression engines.. Someone running 8.5 to 1 compression won't benefit power or mileage wise from 94 octane versus 89 octane other than the fact that the higher octane usually burns a little bit cleaner but that isn't really a reason to pay for it.
http://www.torquecars.com/articles/fuel-octane-ratings.php