I guess this is something that doesn't really phase me. We have one choice of gas on base, which is 91 RON. If I ride far enough to need refueling off base (Japan), the price difference between regular and premium really isn't that much, so I could go either way. Good thing I don't need to do that often, because the price of regular gas here in Japan is roughly double what we pay on base. At current exchange rate one gallon of Japanese gas is about $7.00 U.S. ::013::