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avgas

Can aircraft certified on 115/145 avgas use the new unleaded fuel?

By Ben Visser · September 18, 2025 · 10 Comments

As general aviation transitions to a lead-free future, some GA pilots are wondering about 115/145 avgas.

A warning from the past for unleaded avgas

By Ben Visser · August 15, 2025 ·

Oil refineries add 0.5 grams of Tetraethyllead (TEL) per gallon to 80/87 fuel. But why?

Everyone beware

By Ben Visser · July 25, 2025 ·

A question that every pilot and general aviation aircraft owner should be asking is “What do I need to do to my aircraft before the transition to unleaded avgas and 100LL is gone forever?”

Blame it on the lawyers

By Ben Visser · June 20, 2025 ·

When there is a problem with the transition to unleaded avgas, maybe those affected will sue the EPA or the FAA. But more realistically they will sue everyone from the airplane manufacturers to the fuel distributor, letting the courts sort it out to determine the winners and losers.

FAA moves to ensure 100LL availability

By General Aviation News Staff · May 2, 2025 ·

Ensuring the availability of 100LL at general aviation airports is in the process of being added to the grant assurances required by the FAA’s Airport Improvement Program (AIP).

The past and future of avgas

By Ben Visser · April 21, 2025 ·

Today’s search for an unleaded avgas is so different from similar searches in the past, which was a very large cooperative effort to find an answer — and they were looking for one fuel that could be produced by any oil company.

Alaska’s avgas anxiety

By General Aviation News Staff · March 23, 2025 ·

“Without a dependable source of avgas, many Alaskans would lose their only access to numerous critical services, including medical care, groceries, and mail.”

Common misconceptions about unleaded avgas

By Ben Visser · March 7, 2025 ·

Why can’t general aviation switch over the unleaded gas as easily as the automobile industry did?

Unleaded avgas: As I see it

By Paul McBride · January 2, 2025 ·

Switching GA to unleaded fuel is something that has been going on for the better part of 50 years, if not longer. I vividly remember being pounded on at EAA AirVenture Oshkosh for many, many years as to why Lycoming wouldn’t approve the use of “car gas” in its engines.

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