1981-06-01

Dynamometer Studies of the Fuel Efficiency Effects of Engine Lubricants Part 1-Apparatus and Approach 810800

Studies of four straight-graded oils were made in a constant absolute manifold pressure/constant absolute backpressure engine test served by a rapid oil exchange system. The studies showed that maintaining the engine in continuous operation and exchanging the oils quickly resulted in a sensitive, economical and rapid comparison of engine efficiency. The preliminary results also seemed to give promise that the technique may produce some basic insights into the frictional factors affecting fuel efficiency.

SAE MOBILUS

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