The API CK-4 oil independently developed by RIPP haspassed all the 9 required engine tests recently.

To deal with the continuously severe requirementsfor engine oil properties and performance driven by extended rain period and higherenvironmental protection and energy saving standards, API issued the latest dieselengine oil specification (CK-4) in October 2016, significantly increased theformula development difficulty.

In the past three years, RIPP has creatively solved seriesof technical difficulties laid in formula development, and successfullydeveloped CK-4 oil. With the high performance inanti-oxidation, dispersity,abrasion resistance as well as cleanness, this oil meets the requirements ofnational VI diesel vehicles.