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Durability has always been the primary function of an engine oil.This continues to be the case,but fuel economy improvement has risen in importance as a feature of a lubricant.This is most easily achieved by lower viscosity lubricants,which could endanger the durability of the engine if not properly formulated.Additionally,fuel economy from the lubricant is also considered over the course of a drain interval and the cost optimal point of servicing the oil explored,independent of other durability concerns.Durability is even more critical when the operating severities of the Chinese market are taken into account.Data are presented which demonstrate the differences in severity and the implications this will have on the lubricant,demonstrating the need for high quality lubricants that will protect Chinese vehicles in operation and,in addition,achieve some level of fuel economy improvement.
Durability has always been the primary function of an engine oil. This continues to be the case, but fuel economy improvement has risen in importance as a feature of a lubricant. This is most likely achieved by lower viscosity lubricants, which could endanger the durability of the engine if not properly formulated. Additionally, fuel economy from the lubricant is also considered over the course of a drain interval and the cost optimal point of servicing the oil explored, independent of other durability concerns. Durability is even more critical when the operating severities of the Chinese market are taken from account. Data are presented which demonstrates the differences in severity and the implications this will have on the lubricant, demonstrating the need for high quality lubricants that will protect Chinese vehicles in operation and, in addition, achieve some level of fuel economy improvement.