The National Biodiesel Board states that biodiesel blends of 20% (B20) and below will work in any diesel engine without needing modifications, and that the blends will work just like petroleum diesel.

The NBB also recommends the following precautions:

• Make sure to by B20 from a reputable source.
• Buy fuel that has already been blended.
• Do not buy from someone who makes fuel in their garage or backyard.
• Stick to a regular maintenance schedule. Biodiesel is a cleaning agen and petroleum deposits may end up in the fuel filter. If your vehicle feels sluggish when accelerating, you may have a plugged filter and should check it immediately.

For a list of retail locations to buy biodiesel, vist http://www.biodiesel.org/buyingbiodiesel/retailfuelingsites/default.shtm.