Av gas

[Bob Mulry]

115/145 was 115 octane lean & 145 Auto Rich or Military Power...

We also had a a J-34 jet engine under each wing that used 115/145 for fuel and part of our pre-flight was to reach inside the tailpipe to break of the stalactites of lead from the fuel.

Flew in P-2V Neptunes .......2 turning & 2 burning

[Jeff Kempton]

Originally Posted by Bob Mulry

115/145 was 115 octane lean & 145 Auto Rich or Military Power...

We also had a a J-34 jet engine under each wing that used 115/145 for fuel and part of our pre-flight was to reach inside the tailpipe to break of the stalactites of lead from the fuel.

Flew in P-2V Neptunes .......2 turning & 2 burning

As soon as I started reading the second paragraph I thought "This guy flew in Neptunes!" lol

I didn't, but I'm familiar with them. We have one on display at an aviation museum that I'm involved with, and the Royal Canadian Air Force also flew them for a few years.

[Adger Smith]

We have some winners...Basic.. rich lean octane..
The only thing that hasn't been mentioned is the chemical enhancement that AV gas has to help keep Carb ice from forming. It doesn't cool like racing gas when it evaporates/vaporizes. So it puts some heat in the induction system that race gas doesn't.
Personal Experience:
My 172 with the 300 Continental "6" engine runs better on a 50/50 mix of 100LL Av Gas and non ethanol 87 octane pump gas. Simply because the engine was designed for 85 octane gas. I have an STC to fly with automotive gas, but the mix is better.

BTY: Jeff and Bob I have an old friend that has been working for a company leasing planes to the Govt. for fire suppression. He started off flying a modified Neptune and moved up to a DC-10. Somewhere I have a video of him in the Neptune making a run on a ridge that was on fire... Cool stuff.