Biodiesel Blends

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Biodiesel Blends

Biodiesel can be blended and used in many different concentrations. The most common are B5 (up to 5% biodiesel) and B*0 (6% to *0% biodiesel). B**0 (pure biodiesel) is typically used as a blendstock to produce lower blends and is rarely used as a transportation fuel.
Low-Level Blends

ASTM International develops specifications for a wide variety of products, including conventional diesel fuel (ASTM D**5). This specification allows for biodiesel concentrations of up to B5 to be called diesel fuel, with no separate labeling required at the pump. Low-level biodiesel blends, such as B5, are ASTM-approved for safe operation in any compression-ignition engine designed to be operated on petroleum diesel. This can include light-duty and heavy-duty diesel cars and trucks, tractors, boats, and electrical generators.

B*0

B*0 is a common blend because it represents a good balance of cost, emissions, cold-weather performance, materials compatibility, and ability to act as a solvent. Most biodiesel users purchase B*0 or lower blends from their normal fuel distributors or from biodiesel marketers. Regulated fleets that use biodiesel blends of *0% or higher qualify for biodiesel fuel use credits under the Energy Policy Act of ***2.

B*0 must meet prescribed quality standards as specified by ASTM D***7.