Leaded AVGAS Has an End Date in the US. Should Indian Flying Schools Care?
SkyManager Team · Published 2026-09-30
The FAA's July 2026 transition plan keeps 2030 as the goal for ending leaded avgas in the US. India's training fleet runs on 100LL from a single domestic refinery. Here is what the shift could mean for Indian FTOs, and how to prepare without guessing.
The plan, in brief
On 30 July 2026, the FAA published version 1.0 of its transition plan to unleaded aviation gasoline. It keeps 2030 as the goal for ending leaded avgas in the United States, with Alaska following in 2032. The plan has four phases: authorising and comparing fuels (running through 2027), building market experience, the national transition, and finally Alaska.
The FAA has been candid about the uncertainty. Its own officials have called the 2030 date aggressive, and the plan leaves price, availability and liability questions open.
Three fuels, no drop-in
The FAA is working with three unleaded candidates:
| Fuel | Producer | Where it stands (per AOPA, August 2026) |
|---|---|---|
| G100UL | GAMI | STC covering all spark-ignition aeroplane engines and airframes; on sale at a handful of US airports |
| 100R | Swift Fuels | STC covering 1,200+ engine models and 1,600 aircraft; ASTM production spec; fleet authorisation expected 2027 |
| UL100E | LyondellBasell / VP Racing | ASTM test spec; full-scale testing under way; fleet authorisation expected 2027 |
The key point for operators is that the FAA considers a universal drop-in replacement for 100LL "not feasible." None of the candidates meets every requirement of the 100LL specification. Virtually every aircraft will need at least new placards, a flight manual supplement and a logbook entry. Higher-compression or turbocharged engines may need more.
212 — US airports offering an unleaded avgas alternative. Out of thousands of public-use airports. Even in the US, infrastructure is the slowest part of the transition.
Why an American rule matters in India
The FAA's plan has no legal force in India. DGCA has announced nothing similar, and Indian FTOs will keep flying on 100LL for the foreseeable future. But Indian schools are tied to the US fuel market in ways that are easy to overlook.
Your engines and airframes are American. The Cessna 172s and Piper Archers that make up most Indian training fleets, and the Lycoming and Continental engines that power them, are certified in the US. Approvals for unleaded fuels, service bulletins and engine-maker guidance will start there. DGCA will eventually have to decide how to treat them.
Indian supply is concentrated. Indian Oil's Vadodara refinery has been India's only domestic producer of AVGAS 100LL since 2022. Before that, all of it was imported. Indian schools have already seen supply interruptions and price complaints. In 2024, some FTOs reported reduced allocations and turned to private importers. If global demand for leaded fuel falls, the import fallback could get thinner and more expensive.
Not every trainer is affected equally. Diesel-engined trainers that burn Jet A-1, such as the DA42 NG twins in Air India Flying Academy's fleet, sit outside the avgas question entirely. Schools planning fleet purchases over the next five years should weigh fuel exposure alongside purchase price.
A practical checklist for FTOs
- Measure fuel per aircraft per hour. Track uplift against Hobbs or tacho time for every aircraft. Our post on AVGAS cost management covers how. You cannot plan for a price change you cannot measure.
- Map your fleet's fuel dependency. List every aircraft, its engine, its compression ratio and its fuel type. High-compression and turbocharged engines are the ones that will need the most work in any future transition.
- Keep a buffer in the contract, not just the tank. Know your supply terms with IOC or any importer, your storage capacity and how many flying days you can cover if a delivery slips.
- Watch the engine manufacturers. Lycoming and Continental service instructions on approved fuels will be the earliest practical signal for Indian operators.
- Factor fuel into fleet decisions. For aircraft you will own into the 2030s, ask suppliers directly about unleaded compatibility and the cost of modification.
A slow change that still needs planning
Leaded avgas will not disappear from Indian airfields in 2030. But the global market that supplies Indian training aircraft, engines and, sometimes, fuel is starting to move. The schools that plan best will be the ones that already know what each aircraft burns and what it costs.
Sources:AOPA: FAA refines unleaded fuel transition framework, August 2026 · FAA: Transition plan announcement · AeroTime: FAA finalises 100LL phaseout plan · Indian Oil: AVGAS · ETV Bharat: AVGAS shortage hits flying schools
Cover photo: Refuelling at JadeWeserAirport by Jacek Rużyczka, via Wikimedia Commons, CC BY-SA 4.0, cropped.
