The great thing about B20 mixes and below is they usually require little to no modification to the engine. The biggest problem with switching over? Usually replacing a fuel filter because the bio-diesel is higher quality and cleans out your fuel system, booya!
Think about it, a 20% reduction of the 40 billion gallons of diesel used every year would be HUGE in terms of prolonging the petroleum supply and dropping demand i.e. helping bringing the price down. This isn't even considering applications for farming, electricity generators, shipping, ect. It's a very uplifting prospect.
