In December, 2016, the American Petroleum Institute (API) introduced the newest specification for heavy duty diesel engine oils. “API CK-4” was developed to protect new and current engine technologies, meet new government regulations and ensure that tests are in place to measure engine oil performance.
Nemco Super DEO/Super Blue 15W-40 and 10W-30 oils are now approved and officially licensed for the new “API CK-4” specification. These oils provide enhanced protection against oil breakdown from oxidation, viscosity loss due to shear, and oil aeration, and are especially effective at sustaining emission control system durability where particulate filters and other after-treatment systems are used. Nemco Super DEO/Super Blue oils still exceed the performance criteria of API CJ-4, CI-4 Plus, CI-4 and CH, and can effectively lubricate engines calling for these earlier service categories.