API CK-4 and FA-4. Technology. Redefined.

The latest benchmark in heavy-duty diesel engine oil specifications represent the next step in fuel efficiency and environmental protection.
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API CK-4 and FA-4.  Technology. Redefined.

Article submitted by Engineers Australia’s Industry Engagement Partner, ExxonMobil.

The latest innovation for the trucking industry is on the market with the release of the American Petroleum Institute’s (API) new heavy-duty diesel engine oil categories; CK-4 and FA-4.

Ten years ago, API introduced CJ-4, paving the way for a change in the heavy-duty trucking segment. It has taken a step further establishing two new diesel engine oil specifications; CK-4 and FA-4. Designed to help vehicles meet more stringent emissions and fuel efficiency standards, these oil specifications are considered the new industry benchmark for commercial vehicle lubricants.

Representing an upgrade to API CJ-4 oils, both API CK-4 and API FA-4 oils help reduce carbon dioxide and greenhouse gas emissions from vehicles and maintain engine durability while improving oxidation resistance, shear stability and aeration control. Yet, they are distinct from each other in terms of application. API CK-4 oils maintain traditional high temperature/high shear (HTHS) viscosity and provide performance benefits exceeding today’s API CJ-4 engine oils while retaining backward compatibility to satisfy older engines makes. API FA-4 oils, on the other hand, are of lower HTHS viscosity and provide enhanced fuel efficiency for newer engines.

ExxonMobil has been actively involved in the development of the specification, with a number of technical experts holding chair positions on the Diesel Engine Oil Advisory Panel and the T-13 Test Development Taskforce. The organisation has also field tested their API CK-4 and API FA-4 formulations on over 200 trucks, accumulating more than 50 million miles of testing data as of June 2017. Over 1.5 million miles are added each month with the help of select fleet partners. The formulations’ performance has proven to surpass the previous API CJ-4 formulations. Learn more about the Mobil Delvac oils.

With such outstanding credentials, ExxonMobil continues to lead the industry by helping owner operators and fleet managers embrace change and adopt these new lubricant specifications to meet future emissions standards. With the help of a lubricant expert, ExxonMobil's Optimised Oil Drain Interval (ODI) Process can help you make sure that you get the most out of your equipment.                                                                                                                                   

Recognising the challenge fleet managers face in implementing these new specifications, the organisation also works with fleet managers to analyse their fleet and determine which trucks can be switched to a lower viscosity oil. Having the right maintenance program in place and support from an experienced lubricant supplier to utilise both API CK-4 and API FA-4 specifications can help owner operators and fleet managers get the most of truck performance and fuel savings. To understand the benefits for fleet managers, OEMs, fleets and owner operators, click here.

If you still have questions about API CK-4/FA-4, learn everything you need to know about the latest diesel engine oil specification change here.

Image: courtesy of ExxonMobil.