Re: hardened valve seats L78
 

I remember a thread a couple of years ago either here or Team Camaro discussing the hazard of using Av gas. Something about it being refined to burn at higher altitudes and that it was not good for street use. There were some detailed analysis included. I buy Trick Racing fuel and put five gallons in and fill up with 92 Octane. I then fill up once more with 8-10 gallons before adding another 5 gal of Trick. I run this way in the L79 and the Deuce and they run great. In the Camaro I run straight Trick since it does not get driven much. I have heard bad stories about what octane booster does to paint if you should spill!! I usually go through a drum a summer using this technique. Jim

Re: hardened valve seats L78
 

Be aware that some airplanes now run the same unleaded gas that your car does. Wouldn't want to pay big bucks for pump gas.

Re: hardened valve seats L78
 

I think the FAA requires a minimum 110LL to qualify for AvGas label. Although, in the Canadian/Alaskan bush country, we use any kind of gas we can get our hands on! Fortunately, here in LV, we have over 50 gas stations that sell 100 Octane at the pump...$3.49 @ Gal. Ouch!

Re: hardened valve seats L78
 

A pilot friend of mine recently told me the newer planes require the higher octane fuel (110). I would have thought the reverse. My reason for going to AVgas is that I'm told it doesn't deteriorate in the tank over the winter like pump gas does. We'll see next spring.
I bought ten gallons of TORCO 112 earlier this year for $5.25/gal. Won't do that again either. Ran great and smells terrific but a little stiff on price. I normally run 93 octane and a can of booster with 2 to 4 degrees advance and have very little ping.

Re: hardened valve seats L78
 

Denis, you have a PM!

I understand the 100 octane aviation gas is reduced lead, not no-lead. Unless you are towing heavy loads over mountain passes, you don't need the lead to prevent valve seat erosion IMO, especially considering the low total miles we typically will run on our babies. The key is the high octane, which will help prevent pre-ignition and detonation. Aviation fuel has the added advantage of being very clean, 10,000 feet is the last place you want to experience a bad tank of gas!

The Feds DO collect a hefty per gallon tax on fuel, as do most states. However, off-road use should be exempt from such taxes as already stated. I believe the key is to make a friend at the airport [img]/ubbthreads/images/icons/wink.gif[/img]

Link to best avgas bargains by state

Good Luck!
-Sam