Rotary Engines - A Fuel and Lubricant Composition Study

In former papers, results of the study of test methods for wear and preignition in the NSU RO 80 engine were given. Conclusions were reached on the effects of the quantity and the viscosity of engine oils, the influence of the apex seal materials, the speed, the load, and the temperatures (coolant and oil). This paper is devoted first to a study of sulfur compounds and lead antiknock additives in the fuel (wear versus sulfur, lead, and scavengers contents), and second to a study of lubricating oils.