The Northwest Biofuels Association has produced a joint letter about biodiesel warranty protocol intended to set the record straight for auto dealers (and everyone else that’s confused about the issue).

Recently, I wrote about how biodiesel’s new ASTM standards could go a long way in improving warranty coverage for biodiesel use in your new car. NW Biofuel’s letter goes into a little more detail, and gives you a reference you can give to your dealership or keep in the glove box. Here’s what you should know:

• Whether or not a biodiesel blend is “recommended” by your automaker is separate from the question of whether the use of biodiesel affects engine warranty coverage. Make sure you know exactly what your automaker specifies.
• Because vehicle warranties only cover parts and workmanship, fuel is not covered under any vehicle warranty.

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