Development of a Single-Grade General Aviation Avgas

To verify the practicality of a single-grade general aviation avgas which would meet the needs of engines using grade 80/87 and 100/130 fuel, a flight evaluation was conducted in selected light aircraft. Some 2200 hr of actual flight operation demonstrated the acceptability of this fuel for grade 80/87 certificated aircraft, together with a performance advantage for grade 100/130 users.