Why the End of 100LL Isn’t About Lead… and Never Was

Podcast: The Truth About the Market Host: Jason Zilberbrand, President of VREF

When the FAA formally committed to phasing out 100LL, the announcement sounded calm, technical, and inevitable.

But strip away the press language, and what’s left is the largest structural change to piston aviation since the jet age split general aviation in half.

In this episode of The Truth About the Market, Jason digs into what the industry still hasn’t fully absorbed:

fuel isn’t just fuel—it’s the hidden margin that holds engine design, maintenance economics, training viability, aircraft values, insurance, and financing together.

This isn’t a political conversation. It’s not nostalgia. And it’s not resistance to progress.

It’s about what breaks first, who pays for it, and why this decision unfolded the way it did.

In this episode, we cover:

• Why removing lead is not a simple octane swap • The unique role lead played as a detonation suppressant—not a performance enhancer • Which piston engines are most exposed (and why turbocharged aircraft sit at the center of the risk) • The quiet economic degradation that comes before mechanical failure • Why flight schools are the first real casualties of the transition • How fuel uncertainty collapses training margins, fleet viability, and rental economics • What G100UL actually solves—and what it doesn’t • Why G100UL is a bridge, not a destination • The FAA’s procedural strategy—and why this wasn’t a traditional rulemaking fight • Why E85 was never a serious aviation solution (despite what it looks like on paper) • How the piston fleet will stratify into survivors, marginal operators, and orphans • Why synthetic fuels are the real endgame—and why they won’t be cheap • How training pipelines will permanently change (younger aircraft, electric trainers, more simulators) • Why this was never about preserving the entire piston fleet • And how aviation doesn’t end—it compresses

Jason also explains why this transition will reshape aircraft values more than any avionics upgrade ever has, and why economic gravity—not safety bans—will determine which airplanes remain viable.

The bottom line:

This was never just a fuel change. It was a filter.

And years from now, when piston aviation is smaller, newer, cleaner, and far more expensive, this moment will be recognized as the inflection point.

If you’re buying, selling, training, financing, or simply trying to understand where piston aviation is actually headed—this episode matters.

Complete podcast and show notes can be found on https://vref.com/podcast

For accurate, defensible aircraft valuations trusted by lenders, insurers, and professionals worldwide, visit VREF.com.

Fly safe. Stay smart.