Tag: 100LL

The FAA delivered an early holiday present to the general aviation industry on Wednesday, by clearing the LyondellBasell Industries/VP Racing unleaded UL100E avgas developed for piston airplanes and helicopters to move ahead into full-scale engine and flight testing. What triggered the...

By Paul Bertorelli University of North Dakota’s flight school has decided to abandon Swift UL94 and return to 100LL after exhaust valve recession in Lycoming-powered aircraft. The school conducted an extensive trial using the new unleaded fuel almost exclusively in its...