100LL avgas was introduced in the 70s. At that time, a fuel system lubricant called Fuel Lube was used to lubricate rotating components subject to fuel immersion (mixture controls, fuel valves, etc). In the 90s, Fuel Lube seemed to no longer be effective and would harden and ball up with the 100LL blend. At the same time, 100LL seemed to take on a different characteristic both in smell and evaporation rates. Small leaks no longer left stains on the hangar floor, for example.
Then EZ Turn was introduced as a “high octane fuel lubricant.” It worked better than what had been used previously. The old Fuel Lube became obsolete.
There is no doubt the industry can move past these hurdles, but testing and fact finding should really be in a controlled environment, not on the ramp.