When (and why) did cars switch from leaded to unleaded fuel?

The first gallon of leaded gasoline was sold in 1923, and it wasn't officially banned until decades later. Why did the toxic ...
Purdue University

Company to develop commercial replacement for leaded general aviation gasoline

WEST LAFAYETTE, Ind. and SIOUX FALLS, S.D. - Professionals in the aviation and energy sectors have formed a company to scale up production of a high-octane, unleaded, sustainable general aviation ...
Flying

Search Continues to Really Get the Lead Out

Tetraethyl lead (TEL) was a crucial additive that enabled the development and high-performance of piston aircraft engines, playing a vital role from Charles Lindbergh's pioneering flights to the ...
The Southern Illinoisan

SIU Aviation researching viability of unleaded fuel

CARBONDALE — Researchers in Southern Illinois University Carbondale’s School of Aviation could help spur the adoption of an unleaded fuel for general aviation piston aircraft both in the United States ...