I’m 38 and believe it or not, looking buy my very first car ever this summer. I’ll probably have less than 00 to work with. I want a reliable used diesel car or truck to run on biodiesel, possibly even veggie oil or filtered fryer grease. Suggestions?

I want to make my own biodiesel fuel from the leftover grease from a McDonald’s nearby my house. Can any one give me a recipe to go from here?

So, here’s what I know:

There are cases online of "homebrewers" who make biodiesel to fuel their diesel-engine cars.

Farms in general a lot of diesel engines.

People commercially sell biodiesel, but many farms don’t make biodiesel themselves.

Gas prices are going up, and depending on the system, the costs of making biodiesel (initial setup, methanol, lye/potash) can be lower than the price at the pump.

If farms have some restaurants or food chains nearby, would it make sense for them to use the cooking grease and make biodiesel to fuel their equipment?

If I buy a Volkswagen 1.9 diesel and buy the conversion kit I want to know how I can make the stuff and there plenty of fast food places here willing to give up grease.
Will the power change any or stay the same.