G100UL unleaded avgas
A 100-octane unleaded aviation gasoline developed by General Aviation Modifications Inc. (GAMI), approved by the FAA in September 2022 under supplemental type certificates covering every spark-ignition piston engine and airframe on the register, the broadest fuel approval the FAA has issued. It is approved through the certificates rather than an ASTM specification, and sales began in California in late 2024. Some engine and airframe makers have not added it to their own approved-fuel lists.
The fuel
- Class
- Aviation gasoline
- Specification
- FAA-approved under STC (no ASTM specification)
- Status
- in use at a few airports
- FAA airport-file code
- G100UL
—
aircraft on the register burn it
no engine series on the register is built for it
2
airports and fields sell it
in 1 states
Approvals the FAA's supplemental type certificates for this fuel · the owner buys the certificate once
| Certificate | Held by | What it approves | Model families named | Engine series named | Date |
|---|---|---|---|---|---|
| SA01967WI (2 OF3) | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas | 88 | — | September 1, 2022 |
| SA01967WI (3 OF3) | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas | 69 | — | September 1, 2022 |
| SA01967WI | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas | 1 | — | July 23, 2021 |
| SE01966WI | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines | — | — | October 28, 2021 |
| SE01966WI (1 OF 2) | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines | — | — | September 22, 2022 |
| SE01966WI (2 OF 2) | General Aviation Modifications INC. | Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines | — | — | September 22, 2022 |
Model families the certificates name · 120, by aircraft on the register
Cessna 172 Skyhawk 20,681Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,637Mooney M-20 6,245Piper PA-32 Cherokee Six, Lance and Saratoga 3,916Piper J-3 Cub 3,804Piper PA-18 Super Cub 3,620Piper PA-22 Tri-Pacer and Colt 2,943Beechcraft A36 Bonanza 2,530Piper PA-24 Comanche 2,428Cessna 177 Cardinal 2,159Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,691Cessna 210 Centurion 1,527Cessna A185 Skywagon 1,372Piper PA-23 Apache and Aztec 1,315Beechcraft 58 Baron 1,295Cessna T210 Turbo Centurion 1,282Piper PA-12 Super Cruiser 1,247Beechcraft 95 Travel Air and Baron 55 1,243Taylorcraft BC12 BC-12D 1,224Beechcraft 35 Bonanza and Debonair 1,077Cessna T206 Turbo Stationair 1,060Diamond Aircraft DA 40 Diamond Star 1,018Piper PA-34 Seneca 996Cessna T182 Turbo Skylane 935Piper PA-31 Navajo and Chieftain 934Piper PA-30 Twin Comanche 880Cessna R172 Hawk XP 758Cessna R182 Skylane RG 706Piper PA-44 Seminole 602Cessna TR182 Turbo Skylane RG 465Piper PA-25 Pawnee 455Cessna P210 Pressurized Centurion 443Piper PA-11 Cub Special 443Piper PA-38 Tomahawk 442Aeronca 65 Chief and Super Chief 377Diamond Aircraft DA20 Katana and Eclipse 364Maule M-5 364Cessna TU206 344Beechcraft A23 329Piper PA-20 Pacer 323Beechcraft B36 Bonanza 308Piper J5 Cub Cruiser 294Piper PA-16 Clipper 276Maule M-7 275Cessna A188 251Ayres Corporation S-2 244Fairchild 24 242Cessna A150 232Cessna T-310 207Maule M-4 207Beechcraft 65 201Daher (Socata) TB-20 200Cessna T337 193Maule MX-7 193Waco UPF-7 189Fairchild M-62 186Great Lakes 2 168Piper PA-15 165Cessna P206 Super Skylane 163Extra Flugzeugbau Gmbh EA-300 156Consolidated Aeronautics Inc. LAKE LA-4-200 139Maule MXT-7 134Taylorcraft BL-65 134Ryan Aeronautical ST3 117Taylorcraft BC-65 109Dehavilland DHC-1 105Interstate S-1 104Piper PA-14 100Piper PA-36 Pawnee Brave 99Mooney M-18 98Howard Aircraft DGA-15 97Piper PA-17 Vagabond 97Piper PA-39 Twin Comanche C/R 82Maule M-6 81Maule MT-7 76Extra Flugzeugproduktions-Und EA 300 73Cessna T207 65Lancair Company LC-40 64Monocoupe 90 63Navion NAVION G 61Cessna T303 60Beechcraft E18 58Daher (Socata) TB21 57Helio H-295 54Daher (Socata) TB 10 53Aero Commander 680 51Extra Flugzeugproduktions-Und EXTRA NG 50Cessna A152 48Cessna T188 42Navion NAVION H 36Cessna M337 34Daher (Socata) TB 9 34Cessna P337 33Cub Crafters CC18 33Grumman HU-16 33Gippsaero Pty Ltd GA8 32S.O.C.A.T.A. MS894 27Cessna TP206 25Omf OMF-100 25Cessna P172 23North American TB-25 22Partenavia Spa P.68C 20Found Acft Canada Inc FBA-2 19Moravan Z242 19Vulcanair S P A VULCANAIR V1.0 19Meyers OTW-160 18Helio H-395 17Helio H-391 16Partenavia S.P.A. P 68 16Rotorsport Uk Ltd MTOSPORT 2017 16S.O.C.A.T.A. RALLYE 235 16Taylorcraft BL12 16Wsk-Pzl Warzawa-Okecie PZL-104 16Consolidated Aeronautics Inc. LAKE LA-4 15Estumkeda Ltd Dba Micco Acft MAC-145 15Piper PA-19 15Slingsby T67 15Symphony Aircraft Ind Inc SA 160 15Waco YKS-6 15Emigh TROJAN A-2 14
The families and series are those the FAA's certificate listing names; a certificate written for "all spark-ignition engines" names none and covers them all. Whether one aircraft is covered depends on its exact model and engine, which the certificate's approved model list settles; the aircraft's own page says what applies to it.
Where it is sold 2 airports and fields in 1 states
| Airport | Where | Based aircraft | Says who |
|---|---|---|---|
| Reid-Hillview Of Santa Clara County | San Jose, California | 330 | the FAA's airport file |
| Watsonville Municipal | Watsonville, California | 282 | the FAA's airport file |
Connections how this fuel links to the rest of the register
Approved for it under an STC
- Cessna 172 Skyhawk 20,681 registered
- Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,637 registered
- Mooney M-20 6,245 registered
- Piper PA-32 Cherokee Six, Lance and Saratoga 3,916 registered
- Piper J-3 Cub 3,804 registered
- Piper PA-18 Super Cub 3,620 registered
- Piper PA-22 Tri-Pacer and Colt 2,943 registered
- Beechcraft A36 Bonanza 2,530 registered
The approvals
- SA01967WI (2 OF3) · General Aviation Modifications INC. 88 model families · Use of GAMI G100UL High Octane Unleaded Avgas
- SA01967WI (3 OF3) · General Aviation Modifications INC. 69 model families · Use of GAMI G100UL High Octane Unleaded Avgas
- SA01967WI · General Aviation Modifications INC. 1 model families · Use of GAMI G100UL High Octane Unleaded Avgas
- SE01966WI · General Aviation Modifications INC. · Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines
- SE01966WI (1 OF 2) · General Aviation Modifications INC. · Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines
- SE01966WI (2 OF 2) · General Aviation Modifications INC. · Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines
Sold at
- Reid-Hillview Of Santa Clara County 330 based aircraft
- Watsonville Municipal 282 based aircraft
- All 2 fields
Other aviation gasoline
The whole map of how records connect · these connections as data: /graph/fuel/g100ul.json.
Sources: FAA Civil Aviation Registry (November 2, 2026) for the engines and aircraft; the FAA airport master file for fuel sold; the FAA's supplemental type certificate listings for the approvals; SAFxCHANGE's record for the plants, deals and the airports named in the news; the sellers' own websites where named. Specifications as published by ASTM International and the U.S. military. The fuel makers' own pages say where their fuel is sold this month; this page is as current as those records.