How would I be able to experimentally test the efficiency of conventional and alternate sources of car fuel?

We are trying to determine the efficiency of unleaded gasoline, pure ethanol, 10% ethanol, B20, and B100 (using Jatropha biofuel). Most likely, we will try to use a basic self built calorimeter to test for how long the fuels burn, how quickly they reach their maximum heat (and what that maximum heat is), the time [...]

List of alternative fuel sources.?

I am doing research for a alternative fuel project for my Environmental Science Class. I am having a hard time deciding on a fuel to use because I don’t want to use a well known one that many people will use. Any suggestions? I was thinking Liquid Nitrogen or BioButanol.