coefficient increased and then subsidized due to the regaining of lubricating film. However at the end of the test, the lubricant film could not be regained causing scuffing/scoring of the surfaces and resulting in higher frictional values. The SAE 10 and SAE 10W40 lubricated contact traversed the smallest distance prior to failure. The intermediate peaks for SAE 10W40 are of higher magnitudes as compared to the SAE 10 oil. When compared with other lubricants the Base oil containing no additive reported highest magnitude of intermediate friction peaks. However, the film regaining capacity of Base oil is superior than SAE 10 and SAE 10W40 oils because of which the contact traversed a longer distance prior to failure. The SAE 90 oil traversed the longest