Airports in Madison, Middleton and Waunakee sell leaded fuel for small planes. In Middleton, lead may have contaminated nearby groundwater.

Different aviation fuel types include Jet A, Jet A-1, Jet B, TS-1, JP-8, JP-4, and AVGAS, each catering to specific needs.

However, that form of gasoline can only power about 68% of piston aircraft, highlighting the urgent need for a universally viable 100-octane fuel to achieve the industry’s 2031 goal. That’s ...