Clean Fuels 101

What are clean fuels?
Biodiesel, renewable diesel and sustainable aviation fuel are domestically produced and commercially available, meeting the nation’s transportation needs today and into the future.
These renewable, cleaner-burning fuels deliver crucial reductions in greenhouse gas emissions and serve a variety of markets, including:
- Ground transportation
- Rail, marine and aviation transport
- Home heating
Why Do They Matter?
With a range of economic, environmental and market benefits, clean fuels are good for farmers, the economy, the country and the planet. They are available now and ready to use in today’s engines.
Frequently Asked Questions
What are clean fuels?
Biodiesel, renewable diesel and sustainable aviation fuel produce lower greenhouse gas emissions on a lifecycle basis and less criteria air pollutants than petroleum fuels. Clean fuels are produced from a variety of renewable feedstocks and can be used as a drop-in fuel in various sectors, including ground transportation, rail, marine and aviation transport, as well as home heating.
What is the difference between biodiesel and renewable diesel?
Both biodiesel and renewable diesel are drop-in fuels – sustainably made from renewable fats and oils – for diesel (compression ignition) engines. Each offers performance improvements over the use of petroleum diesel, such as higher cetane values and the reduction of greenhouse gas emissions.
Biodiesel is produced through transesterification, which converts feedstocks into fatty acid methyl esters (FAME). Biodiesel meets the ASTM D6751 specification.
Renewable diesel utilizes a production process more like diesel fuel production. It meets ASTM D975 – the same standard for petroleum diesel.
Why are clean fuels important?
Clean fuels provide a wide range of economic, environmental and market benefits, making them good for farmers, the economy, the country and the planet.