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Speak with an Aviation Gasoline Specialist
To provide the best fuel quality and ensure the safety to participants and machinery, avgas 100LL must meet specific product standards and specifications before being distributed to end users. These standards ensure avgas 100LL remains fungible, or chemically identical and interchangeable with avgas 100LL produced anywhere in the world. The two most commonly used standards for avgas 100LL include the United Kingdom’s Ministry of Defense (MOD) DEF STAN 91-90 and the American Society for Testing and Materials (ASTM) standard ASTM-D910.
First released in 1999, the ASTM-D910 serves to provide specifications for “purchases of aviation gasoline under contract and is intended primarily for use by purchasing agencies. This specification does not include all gasoline satisfactory for reciprocating aviation engines, but rather, defines the following specific types of aviation gasoline for civil use: Grade 80; Grade 91; Grade 100; and Grade 100LL1.” The standard includes a lengthy testing and measurement standards for produced products with some key factors listed below:
Most producers of avgas 100LL are required to provide a quality assessment with shipped products that prove the products meet the specification requirements for ASTM-D910.
First released in 1996, “this Defense Standard specifies the requirements for three grades (AVGAS UL91, AVGAS 100 and AVGAS 100LL) of gasoline type aviation fuel intended primarily for use in aircraft spark ignition reciprocating engines. Fuel provided to this specification shall possess satisfactory performance and properties when used in appropriate aircraft or engines operated by the Crown, or for which the Civil Aviation Authority (CAA) or European Aviation Safety Agency (EASA) is the certificating agency2.” The standard includes a lengthy testing and measurement standards for produced products with some key factors listed below:
Both DEF STAN 91-90 and ASTM D910 set strict and specific requirements for aviation gasoline to ensure safety, performance, and environmental compliance. DEF STAN 91-90 is primarily used for European standards with ASTM D910 primarily in the US, though both are accepted globally Compliance with these standards ensures that avgas 100LL meets the necessary criteria for use in aircraft engines designed for this type of fuel.
