It absorbs water and then separates faster , the water more or less causes build up of crap in your tank , in your lines and in your float bowls . Usually leads to premature gasket failures and clogging . Not to mention older stuff is made of steel so that will rust of left long enough . Newer stuff has less problems but it ' s still there . You can buy race gas for vehicles and many gas stations have a straight 90 octance usually near the diesel big rig fill spots that works great for your lawn equipment or hot rod . <| sep |> Ha ! Excellent ! Thanks for the laugh man ! <| sep |> It might have been a bit condescending , yeah . though our reaction definitely arose out of some serious concern . She seems to be pretty idealistic about the whole thing , and it ' s a REALLY bad idea to be working in a prison and not have an idea of who you may be really working with . Also , she ' s not single . Her bf was sitting there with us .