docmirror

Although the av-gas was defined as 'low lead' it still has significant lead emulsified in the fuel.

There are three reasons why av-gas is not typically sold for road use. First, is the lead issue. It'll ruin a cat after a few tank fulls. Also depending on stoich ratio, it'll leave deposits of lead on the valves, spark plugs, etc. Not good. The next two issues are the same, but it's taxing issues. Cars used on the road, must pay road-use taxes in their fuel. Same as the reason you can't use farm diesel in a road truck/car. Big fines for the folks who sell av-gas for road use. And, the other way around, av-gas is taxed differently, and using it for the road deprives the Airport and Airway trust fund of $$$.

Strangely enough, the opposite is not true. While cars can't burn av-gas, planes(with proper licensing) are allowed to run auto gas(non-eth). Also, not just that we can run auto gas in planes, but we can also apply for a tax credit for the road-use part of the fuel tax since it wasn't used on the road. Cha, and ching!

Wisconsin Joe

Or you can simply buy "mogas" (auto gas) from a supplier who doesn't charge the taxes. Similar to "off road" diesel. However, the taxes for using it in the air (Airport & Airway Trust) must be filed and paid.