LUBRICATING OIL WITH IMPROVED WEAR PROPERTIES

摘要

Provided is a lubricating oil composition for internal combustion engines comprising at least one hydrocarbon base stock which is determined to exhibit a 40C PVC/100C PVC ratio approaching one or greater, and one or more lubricating additives. Also provided is a method for preparing such a composition, which includes determining the 40°C PVC/100°C PVC ratio of a hydrocarbon base stock oil, and selecting a hydrocarbon base stock oil which exhibits a 40°C PVC/100°C PVC ratio approaching one. One or more lubricating additives is then added to the selected base stock oil.