A Radioactive Tracer Study of Lubricating Oil Consumption

INFORMATION in the literature on piston ring phenomena, including lubricating oil consumption, was relatively abundant prior to the end of World War II and the widespread introduction of the turbine engine. (1)^* Since then it has become relatively scarce compared to other reciprocating engine phenomena. The reasons for this situation are related to two factors:

1. 1
   The decrease in emphasis occasioned by phasing out of aircraft piston engines.
2. 2
   The difficulty which is entailed in obtaining data on oil consumption.