Replying to Waste Vegetable Oil Project Cars

I'm considering buying a 1990 Jetta TDI, getting a grease kit and start making my own fuel. Figure I'll save some money, save the planet and all that other hippy bullshit.


For career ideas, something that dwells in the back of my mind is leaving this place better then we found it, which is near impossible but may aswell start somewhere. In school I'd like to study to make a more efficient or alternate energy vehicle.

I tend to be a big picture thinker, but before I go and blow a bunch of money anyone want to stop me? Or has anyone done this and have any tips or useful websites?
Thanks