API PC-12 engine oil categories CL-4 and FB-4 are advancing toward a 2027 launch. Here’s what the changes mean for fleets, ...

When you look at a bottle of motor oil, you are assaulted by all the numbers and letters and whether or not it's synthetic. Without knowing what those figures signify, it can look almost random when ...

Two new engine oil blends in development for over five years have been officially released on the trucking market: CK-4 and FA-4. The oils are the offspring of the Proposed Category 11, or PC-11, ...

While “plus” often reflects marketing hype rather than any real extra capability, that is not the case for CI-4 PLUS. The latest engine oil classification enhancement from the American Petroleum ...

Three years from now, you'll see a new API diesel engine oil-service category, designed to help meet federal greenhouse gas/fuel economy standards, which have a final phase-in date set for model year ...

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 ...