I've seen others who had problems with flex lines and rubber type products break down over time causing expensive repairs. Another problem is the high lead content. 100LL has about 4 times the lead that leaded automotive fuel had. This can cause fouled plugs, O2 sensor and catalytic converter failure. Not to mention the oil contamination and sludge build up that occurs over time. General aviation is very antiquated. If it was cost effective all those gas motors would run on some version of 80UL. And last but not least, avgas is very expensive.

AirNav: Local Fuel Prices

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