im trying out driving at around 70 instead of 80 on this tank of gas(went to daytona on 1-4 yesterday)so far it does seem to improve mileage a bit although i think i will need to make several more trips to the beach to be sure.it seems like that extra 10 miles per hour really increases drag and engine speed without dramatically reducing travel time.not sure much can be done around town since i dont over rev .