From state website
In compliance with Oregon's Renewable Fuel Standard [Ref. Oregon Revised Stature (ORS) 646.921 and ORS 646.922] All diesel fuel sold or offered for sale in Oregon must contain a minimum of 5 percent by volume biodiesel, creating a B5 biodiesel blend, except for 1) railroad locomotives, 2) marine engines and 3) home heating applications.
David Kb7uns