I am noticing that when I add Star Tron Fuel Additive, it seems to counter the ethenol problem. It worked very well in the motorcycles, and seems to add a few miles per gallon in the car as well. We don't have the best burning ethenol in the Northwest. It is kind of like when you feed corn to a baby and it fills the tummy, but just runs right through? Seems like it fills the tank, but the cars around here seem to run their fuel tanks dry faster and go fewer miles using it.