1988, Kas Thomas, Fuel and oil systems: basic and advanced light plane maintenance, Cylinder cracks are nothing new, however, and there is no reason to expect autogas-burning engines to have a higher incidence of head cracking than avgas-users
1994, Michael J. Kroes, Aircraft powerplants, In the area of autogas volatility, a Reid vapor pressure of 9.0 to 15 is very common, compared to the vapor pressure of avgas, which is 5.5 to 7
2006, Autogas can be obtained for a fraction of the cost of avgas, but its use is not without controversy.
