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What is API and what does API SM means?

April 26, 2017API means SM

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What is API and what does API SM means?

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API means; American Petroleum Institute. It classifies lubricants based on level of performance. The ‘S’ category (for gasoline engine Oils) spans from SA to SM- the latest performance level for gasoline engine oils. The “C” category (for diesel engine oils) spans from CA to CI-4 for the diesel engine oils. The higher the associated alphabet, the better the performance. Thus API CF is higher than CC, while API SF is higher than SC. An API SL/CF means it could be used for both gasoline and diesel engines at respective performance levels specified. Our top of the range engine oil ie Engen Super and Dieselube 700 Super are API SL and API CI-4 Plus respectively, the most advanced lubricant performance levels available in Nigeria.