#### TFF

##### Well-Known Member
The last 20 years Lycoming and Continental engines can handle no lead. Most engines can handle lower octane.

The issue is legacy engines that are high octane and or that need lead. As it sits the only way the FAA can legislate no lead is to ground any aircraft that requires leaded gas especially high octane. It would be in the form of an AD. No one with a car has to follow a recall. Airbags not going off or with more force breaking your neck does not require you to comply. The dang cheapskates that airplane owners are, me included, would bear arms if your 1972 Mooney or your 1959 172 required an engine before next flight by an AD.

Safety police also have to make sure you are not calling it complied with. Unleaded will be cheaper. How will the FAA keep you from putting unleaded in your Cessna 310 turbo, when it has to have lead.

The FAA told the EPA to shove it. They protected you from the AD that could ground your plane. EPA getting constant pressure from the government who is getting pressure from The UN. There is no way the FAA with its 100% or else can do anything but stall. They definitely don’t have the budget or backbone to go through every type certificate to pitch out the problem planes and ok the others. They can’t say “most likely not to have a problem.” That’s not 100%. The FAA’s yearly budget is about the same as what some billionaire’s kid buys a house for to trash. At some point some aging aircraft line in the sand will be drawn, not for safety like they say, but because it’s the only way they can catch up.

#### BBerson

##### Light Plane Philosopher
HBA Supporter
Propane is 91,000 btu per gallon. Fully vaporizes and is octane 120. Might only need a small percent injected to raise octane. Propane is delivered almost anywhere.

#### Doggzilla

##### Well-Known Member
HBA Supporter
Propane is 91,000 btu per gallon. Fully vaporizes and is octane 120. Might only need a small percent injected to raise octane. Propane is delivered almost anywhere.
Physically this is possible but I am not sure about chemically. Since the fuels cannot blend this may not have the intended effect.