Originally Posted by Rob M

Unfortunately, I'm forced to provide a little Econ 101:

OK, so the guy down the street has a diesel engine car that smells like french fries when he drives. That is great for him (really, it is). But when you do a little investigation (so easy a brainwashed caveman can do it), you will see that in the U.S. there are only around 100 million gallons of used cooking oil "produced" each year. Sounds promising, except that we use 140 BILLION gallons of gasoline each year! So there is enough of this recycled biodiesel for 0.07% (or 1 in 1,400) of us to use to run our vehicles. Can you imagine if a handful or other drivers in your town start burning the recycled oil? Your neighbor would be waiting in line and the same 20 gallon bucket would cost $50.