PC-12 has been fully approved by API and will replace CK-4 and FA-4 engine oils starting in 2027. The new engine oil category includes FB-4 for lower-viscosity oils and CL-4 for higher-viscosity ...

The transition to CL-4 oils is expected to be backward-compatible, but FB-4 use may depend on OEM approvals for specific engines and applications. Tanks and bottles of heavy-duty diesel engine oil ...

Oil companies have done extensive testing of CK-4 and FA-4 engine oils to help give engine makers and fleets confidence in the ability of these oils to protect engines and even extend drain intervals.

Truck and engine manufacturers are in the final stages of launching engines compliant with new, stricter emissions regulations, and those next-generation engines will bring with them next-generation ...

January 1, 2027, will be the first license date for two new heavy-duty engine oil categories, if all goes as planned. An update from the American Petroleum Institute said it has made significant ...

U.S. crude oil inventories ​fell for a ‌fifth straight week last week, according to ​market sources ​citing American ...