I usually average 2-3 MPG more on BP 93 than Shell premium. It has much more power with the BP over other gasoline brands. What I discovered is not all BP gas is alike. I know what you're thinking... the gas all came from the same truck....but I don't know if some of the underground tanks may have water in them or ???? All I know is the best BP gas around is at 87th & Goddard in Lenexa (Chris L should know where that is) . Try it next time you are out that way and you will be amazed. I can even tell the difference when I fill up my Scion with it.