Further our story "API's CK-4 and FA-4 Licensed Oils Lists Available" that appeared in the December 12, 2016 issue of the OEM/Lube News, the number of CK-4 licenses issued to date stand at 523 and the number of FA-4 licenses issued to date stand at 76.

 

Kevin Ferrick, Sr. Manager EOLCS/DEF/MOM, API, Washington, DC, told OEM/Lube News "These numbers can easily vary daily because our licensing system is updated real-time".

 

On December 1, 2016 the American Petroleum Institute's (API) new diesel engine oil standards, API CK-4 and FA-4, began appearing in the marketplace on licensed products.
 
API CK-4 oils replace current API CJ-4 engine oils and are backward compatible with most applications where engine manufacturers have recommended CJ-4. The CK-4 oils will provide a number of improvements over CJ-4, including improved shear stability, oxidation resistance, and aeration control. API FA-4 oils will provide similar improvements over CJ-4 oils, but it is important to note that FA-4 oils are only intended for use in newer on-highway diesel engines. FA-4 oils will have limited or no backward compatibility with on- and off-highway diesel engines where engine manufacturers recommended CJ-4.