I won't know until it gets cold again next winter. I expect this summer to get consistent 25 mpg. That helped 1 or 2 mpg when I figured that out. I hope to do some testing this summer on various blends of gas when the wind is nil and temperatures are stable. I have driven other vehicles in low and high altitudes.
High altitudes seem to help mileage a bit with the thinner air despite loss in power.
All Rights Reserved.