I remember seeing mentions of the usage of 2-stroke oil in fuel to prevent rust in the carburettors of some older vehicles due to the ethanol blends on gas.
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Originally Posted by Piotrsko
Think you have the valve materials switched, maybe, and 100/110 "lowlead" avgas has multiples of the car lead quantities. It is lower lead than 145 fuel and 80/87 is not readily available.
20 years ago I was able to have hardened faa approved seats installed in my O-290 lycomming and all the rubber parts were replaced with new style alky resistant AN hoses so I could buy a stc for cars gas.
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Nowadays there are even ethanol-powered aircraft. AFAIK cropdusters in Brazil are now using ethanol more often than AvGas.