B20type

B20type is a designation that appears in some technical catalogs, fuel specifications, and procurement documents to indicate a B20-type biodiesel variant or a product compatible with B20 biodiesel. The exact meaning of the term can vary by region, manufacturer, or industry, and it is not a universally standardized label.

In most common usage, B20 refers to a diesel fuel blend consisting of 20% biodiesel (typically fatty acid methyl esters) and 80% petroleum diesel. This blend is used to reduce lifecycle greenhouse gas emissions and to support renewable content goals in diesel programs. Standards such as ASTM D6751 (United States) and EN 14214 (Europe) define the properties of biodiesel blends, including ester content, viscosity, flash point, and other performance characteristics. Vehicles and equipment documented as compatible with B20 are expected to meet these specifications when operated with the blend.

Engine compatibility and performance are central considerations. Many modern diesel engines can run on B20 without modification, but owners should follow manufacturer guidance, as some older engines, seals, or fuel-system components may have limited compatibility. Practical considerations include storage and handling, since biodiesel can be more hygroscopic than fossil diesel and may require clean, moisture-free tanks and proper filtration to avoid deposits or fuel-filter plugging.

See also: Biodiesel, Diesel fuel, ASTM D6751, EN 14214, Renewable fuels.