Interesting regarding the possible future of aircraft fuels and alternatives. Amazing to read that Avgas 100LL has several times more lead than some car fuels. In NZ there is no Avgas100LL (blue coloured) that I am aware of, its all Avgas100 of the green variety (so much for clean and green). The quality of Avgas has dropped noticeably in recent times. It now has more of a sulphur smell to it than it used to, and in recent times we have had many new problems with Avgas, from contamination scares to common every-day plug fouling. Maybe this is one way for the fuel companies to ruin our engines slowly and force us into new fuels later. Does anyone know why Avgas has a stronger sulphur smell today, than it did two years ago?
Kermie