Energy conservation, as a major goal, has achieved international consensus in all of the civilized world. Behind the worldwide conservation efforts are three irresistible forces - economics, the realization that energy resources are being depleted, and environmental objectives. The paper presents the energy utilization in a car, the main mechanisms that contribute to energy kosses in a lubricant/machine system, location and nagnitude of frictional losses, and fuel economy factors related to engine and gear oils.
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