Noun
mogas (countable and uncountable, plural mogases or mogasses)
(aviation) Automotive gasoline suitable for use in some piston-engined gasoline powered aircraft.
The aircraft is expected to deliver 100 kts cruise speed from a 30 hp Wankel engine, with a fuel economy of 75 mpg using standard motor gasoline (MOGAS), developing 22 kW (30 hp). Source: Internet