On December 19, 2016, Great Wall Lubricants obtained API latest-generation diesel engine oil specifications CK-4 and FA-4. CK-4 and FA-4 are the latest generation of diesel engine oil specifications introduced by API since the introduction of CJ-4 in 2007. API has been planning to introduce a new generation of diesel engine oil specifications since 2011, after 6 years of work This specification was formally introduced this year. This specification emphasizes the fuel economy and oil change intervals of the product, further enhancing the overall performance of the product. 
Great Wall Lubricants Obtains API Latest Generation Diesel Engine Oil Specifications CK-4 and FA-4
Great Wall Lubricants Obtains API Latest Generation Diesel Engine Oil Specifications CK-4 and FA-4 Since December 1, 2016, the API has officially accepted applications for certification from global lubricant companies. Great Wall Lubricants through a large number of early research and development work, on December 1 formally submitted a product certification application, and on December 19 this formally obtained the certification, becoming the world's first batch of lubricants companies to obtain this certification.
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