Ah-ha, yes I do, and coincidentally enough on those occasions where I have tanked up at other gas stations, they have the sticker saying "10% ethanol" on the pump, so thanks, mystery may be solved. Although that brings up a further point, we're paying quite high prices for gas as it is, and yet we're getting less for it, which means that gas (fuel) is on the order of 6% or so more costly than the posted price because it is 6% or so less efficient. Ugh.