from what i've read it's a fairly easy conversion. the making of the fuel can be time consuming and you def need a good supply of grease for it to be effective.
-you need space to make the stuff (also lye, and methanol) -you need a source of WVO aka waste vegetable oil - this is no problem if youre friends with a fast food place or know someone who collects it -it is technically illegal in some states becuase there is no highway tax added on (just like rujnning heating oil in a diesel truck) -in cold climates you may need a fuel tank heater, to keep the fuel from getting too thick -all the new cars coming out in the next 3 years are going to be well designed, really good mpg and great performance, also capable of running many different fuels. CNG, propane, ethanol, there are many other options besides gasoline
neighbor has been running a dually truck with this stuff for a few years now. Spoke to him the other day said I could use his set up and we could split the work and cost of cleaning the oil which sounded great to me. Didnt know how it would be converting a car and having spare tanks compared to his which he has in the bed
The comversion to you vehical is very simple and if you are fair good with automotive repairs you can have this done in a day or two most. Too make the fuel like state it need alot of space and time to make a good amount of it Bio Fuel. The start up cost for the kits to make the fuel can be expensive but overtime you make your money back and I belive it is a tax write off in some states
Another plus is your exhaust smells like french fries, onion rings, and chicken wings much like the exhaust vent of any fast food joint.
Neil young on US oil consumption Check out this Neil Young interview from Charlie Rose. He's talking about biofuel cars and stopping oil addiction. http://www.youtube.com/watch?v=Qznv7ydKKYc