IRS Definition of "Alternative Fuels"

Check out IRS Form f8911 which is an ALTERNATIVE FUEL STATION CREDIT

There are more details to look into but I wanted to start out on it. Alex and Anthony not sure if this is you guys yet or not or if it's worth it.

Alternative fuel. The following are alternative fuels.
• Any fuel at least 85 percent of the volume of which consists of one or more
of the following: ethanol, natural gas, compressed natural gas, liquefied
natural gas, liquefied petroleum gas, or hydrogen.
• Any mixture which consists of two or more of the following: biodiesel (as
defined in section 40A(d)(1)), diesel fuel (as defined in section 4083(a)(3)), or
kerosene, and at least 20% of the volume of which consists of biodiesel
determined without regard to any kerosene in such mixture.
• Electricity.