DETERMINATION OF DILUENT IN USED RAILWAY DIESEL LUBRICATING OILS

Previous procedures for estimating diluent in used railway diesel lubricating oils all have drawbacks. Precision is limited in simple procedures. A research procedure is time consuming and requires specialized equipment and highly skilled personnel. The authors describe a graphic correlation for estimation of amount and type of diluent as functions of decrease in flash and viscosity. Also included are empirical methods for development of the dilution chart without recourse to experimental blends of the oil with diluents.