It’s an advanced, next-generation engine oil standard focusing on ultra-low viscosity oils for modern engines. When purchasing oil, look for the API Service Symbol "Donut" on the label, which is an ...

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 ...

Inside an engine test cell at San Antonio’s Southwest Research Institute, which helped develop two new engine tests that define the wear-performance parameters of the new PC11-A and PC-11-B ...

The next-gen heavy-duty engine oil standard (PC-12) has been formally approved, announced the American Petroleum Institute, which also introduced the new CL-4 and FB-4 “donut” certification marks ...

The American Petroleum Institute (API) announced that the new PC-12 heavy-duty engine oil category has been formally approved. “To support the next generation of heavy-duty engine technology and ...