We just did another test to determine miles per gallon on my trike. This ride covered mountains, twisties, country roads and a little bit of traffic lights. The result being 42.09 mpg. In FL it was 42.5. I guess the mtns didn't make much of a difference. I have started an Excel spreadsheet and will be keeping the mileage with every tank of gas. Will give a summary at the end of summer and see how it pans out. In case Screwball reads this...no I don't coast down the mtns.