FWIW here is the mpg (US) graphs for our 2009 35 delivered in Aug. '09. One is by mileage the other by date. These graphs are based on a fuel log where we write down every gallon we put in the 35d and at what mileage. We attempt to fill the tank each time. The diamonds are mpg since the last fill up. The curve is mpg since the very first fill up.
So what mpg should I say we were getting so we can compare mpg? The mpg/tankful on summer or winter diesel? The long term average of every gallon and every mile? The mpg number I see most often on the dash display?
Funf Dreisig