Veggie Oil FTW.
Either way :tup: to you for getting hat you need in a much more practical diesel package.
Oh, and I guarantee that the variance in fuel economy is all from the driving style. People complain about the gas mileage of MR2s on the mr2 boards all the time, but I stya out of boost, and accelerate like a grams most the time and see MUCH better economy than my 25mpg average DSM.
All depends on how you drive personally.