I am seriously thinking about something like a Lister or maybe a single cylinder Duetz diesel, and playing with the idea of seeing just what kind of waste oil can be burned. My grandfather and great gradfather ran John Deere "all fuel" tractors, and burned a grade of fuel called distelate, something maybe a notch higher then kerosene.....and sometimes, they burned straight fuel oil in the old D John Deeres....that is one of the reasons for the water injection valve into the intake.....
So anyway, if the Democrats keep blocking the expansion of our domestic drilling in favor of taxing us to lower prices (figure that one out), then things are going to get interesting.