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 ...

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 diesel engine oil available for your fleet is about to undergo a major change. Two new oil categories, CK-4 and FA-4, have been announced by the American Petroleum Institute (API) and will replace ...

SAN ANTONIO. The industry campaign to develop not one but two new API oil-service categories to eventually replace the current CJ-4 spec for heavy-duty diesel engines is on a fast track for new ...