Laboratory Engine Test for Two-Cycle, Spark Ignition Gas Engine Lubricants 660777

A laboratory engine test method for predicting lubricant performance both quickly and economically in two-cycle gas burning engines is described. Following preliminary test work covering the effects of such variables as engine output on deposit levels, piston height setting, and cylinder lubricant feed rate, a test procedure was evolved which showed reasonable correlation with field results. Tests conducted using a variety of nondetergent lubricants indicated both good and bad features in base oil performance. It was concluded that with careful selection of the detergent-inhibitor additive (either ashless or metallic type), the shortcomings of a particular base oil can be minimized and good overall results obtained.


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