[BMWX54SFV]

Had to drive 120 miles to pick up a family member at the airport. Filled up with Shell Bio-Diesel, ($4.12/gal in South FL) got right on Turnpike and set cruise control at 65 mph.

After 120 miles average mpg was an astounding 29.7. Tac was at a constant 1850+/- rpm and no traffic ahead of me. Was able to maintain speed all the way for the duration of the 120 mile trip.

On the way home I kept cruise at 74 mph with tac at about 2200 and the average was 27.2 mpg.

Of course we always knew that if you keep the tac below 2000 rpm you will optimize your mpg. I am also a firm believer that the marque of the fuel you use has an effect on your results. Their has always been Tier 1 and 2 fuels and using a Tier 1 is not only better for the vehicle but give better fuel mileage.