Biodiesel for your boat, car, etc.

Recommended Substitute

Biodiesel is widely used in the US as a B20 blend, containing 20% Biodiesel and 80% petroleum diesel. Under EPA guidance, B20 blends can be used in unmodified diesel engines with rubber seals and gaskets.


Biodiesel at 100% concentration can be used if proper precautions are taken. Swapping seals and gaskets to synthetic materials if you currently have rubber seals is the most common solution, making your engine suitable for B100. You're on your way to a greener future!

Further Reading

National Renewable Energy Laboratory's Biodiesel Handling and Use Guide:

Feel free to consult your engine manufacturer for further information about procedures before using biodiesel blends higher than B20.
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