[Woj]

A gent I worked with some years back, who also had a large car collection, told me that his research on 100LL (Low Lead) Aviation Gasoline revealed that it contained 12 times more lead than our old leaded fuel from the 1970s. I put at least two gallons in my cars when I can to at least keep some lead in the fuel.
The other benefit with aviation gas is a very long shelf life. There is a definite increase in performance with the avgas, even in my 307 Camaro.

Phil Woj.