Biodiesel stations in Minnesota

Minnesota: B20 isn't an option, it's the law

Minnesota was the first state to mandate biodiesel, starting with B2 in 2005. Under Minn. Stat. § 239.77, nearly all diesel sold in the state must now be at least B20 from April through September and at least B5 the rest of the year (April is a transition month at B10). There are narrow exemptions for things like railroads, nuclear plant generators and some off-road equipment.

That changes how to read this page. AFDC lists the stations that report B20 — mostly Casey's and Kwik Trip — but in summer, essentially every diesel pump in Minnesota is a B20 pump, listed or not. It also makes Minnesota the country's longest-running real-world test of B20 in ordinary cars, trucks, school buses and farm equipment through serious winters; the seasonal drop to B5 is what makes that work. Nearly nine in ten listed stations here show the summer/winter split.

Tips for Minnesota drivers

• If your vehicle is limited to B5 (most European diesels), be aware that summer diesel here exceeds that. Some stations sell a labeled lower blend or premium diesel; ask.
• Carry a spare fuel filter in fall and spring, when blends change and old deposits move.

State incentives and mandates change. The current list for Minnesota is on the AFDC Minnesota laws and incentives page.