The latest data from the U.S. Energy Information Agency shows alternative fuel use is up. And when it comes to what the groups using fuel at the highest rates, the larger, medium duty vans, are picking to replace non-renewable oil, that choice is biodiesel.

Many fleets meet petroleum reduction requirements by using biodiesel rather than alternative fuels. Changes in biofuel subsidies, specifically replacement fuels like ethanol and biodiesel, affect consumption trends in the marketplace. With the reinstatement of the biodiesel tax credit and the requirements under the Renewable Fuel Standard, consumption of biodiesel grew almost 240% between 2010 and 2011.

The report goes on to say ethanol consumption during the same period remained flat, but the use of electricity in light-duty automobiles increased by 36 percent.