Hey all...I've been sneaking around in here for a little bit, and am in awe. I didn't realize how far along fuel efficiency and pollution controls have gotten.

Well..here's my idea, with questions to follow. I live in a hipster area of the city. Great part of town, really nice people, even if we can't see eye to eye on a lot of things. Within this part of town, there are a lot of restaraunts. Now with this type of crowd, the environment and fuel efficiency are a big deal. I've noticed a lot of gas powered cars, but there are still some diesel guys about.

How about opening a shop that did the conversions and made the fuel?
What options are there for gasoline engines?
How difficult is this deisel conversion?
Are there a lot of regulations involved?

Am I way off base here? I've only recently become curious about Biodiesel and alternatives, so as far as I know, I'm pipedreaming. How reasonable is this?