Grade 100VLL aviation gasoline (avgas) is developed to provide a lower lead alternative to 100LL in response to impending environmental regulations. Grade 100VLL is identical to 100LL in all aspects, except that the maximum lead content is reduced by about 19%.
Grade 100VLL has the same minimum octane rating and will provide the same level of anti-knock performance as 100LL and 100 avgas grades.
The FAA collaborated with industry on the ASTM International task force that evaluated data supporting the incorporation of grade 100VLL into specification D910. The FAA determined that grade 100 VLL meets all of the performance requirements of grades 80, 91, 100, and 100LL and will perform identically in existing aircraft and engines
1. Grade 100VLL avgas is acceptable for use on those aircraft and engines that are approved to operate with grades 80, 91, 100, or 100LL avgas.
2. ASTM D910 specifies blue coloration for both grade 100VLL avgas and grade 100LL avgas, and, therefore, these fuels are visually indistinguishable from each other.
3. Operating limitations in Aircraft Flight Manuals, Pilot Operating Instructions, or TCDSs that specify grades 80, 91, 100, or 100LL avgas fuel are acceptable for use with grade 100VLL avgas.
4. Current aircraft placards that specify grades 80, 91, 100, or 100LL avgas are acceptable for use with grade 100VLL avgas.
5. Operating, maintenance, or other service documents, for aircraft and engines that are
approved to operate with grades 80, 91, 100, or 100LL avgas, are acceptable for use when operating with grade 100VLL avgas.