Research. Sustainability. Outreach.

Biodiesel Blending

Biodiesel can be blended and used in many different concentrations with petroleum diesel depending upon the desired application.

Low Level Blends
  • B5: 5% biodiesel, 95% petroleum diesel
  • ASTM approved for safe operation in any compression-ignition engine designed to be operated on petroleum diesel
  • Can be used in light and heavy-duty diesel cars/trucks, tractors, boats, and electrical generators
  • 20% biodiesel, 80% petroleum diesel
  • Most common biodiesel blend in the US
  • Good balance of cost, emissions, cold-weather performance,  and materials compatibility
  • Blends at or above B20 qualify for biodiesel fuel use credits under the Energy Policy Act of 1992
  • 100% biodiesel
  • Can gel in cold temperatures, impact engine warranties, and suffer from microbial contamination in tanks
  • Less common than B5 or B20 due to a lack of regulatory incentives and pricing
  • Contains about 8% less energy per gallon than petroleum diesel


Source: US Department of Energy



KU Today
One of 34 U.S. public institutions in the prestigious Association of American Universities
44 nationally ranked graduate programs.
—U.S. News & World Report
Top 50 nationwide for size of library collection.
23rd nationwide for service to veterans —"Best for Vets," Military Times