by Jim Cavanagh

Aircraft owners have been waiting for 25 years for the next great fuel that would replace the deadly, lead-bearing avgas that the entire industry—at least on the piston side—depends on. And for just as long, the aviation press has been publishing sky-is-falling stories about the imminent demise of 100LL.

Hasn’t happened. Why? While leaded avgas does represent a potential problem, it doesn’t have to do with availability so much as not knowing what to expect. Pilots and the aviation press seem to be most worried about suddenly losing supplies of avgas with no replacement readily available. …