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, ...

The American Petroleum Institute's new diesel engine oil-service categories, API CK-4 and FA-4, will begin appearing in the marketplace on December 1. New API Donuts denoting the categories will ...

Years of work in the lab and millions of miles of road testing has culminated in three new Rotella engine oils formulated to meet the API CK-4 and FA-4 oil-service categories that will start coming on ...

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 ...

The new API CK-4 oils deliver many benefits that directly address major issues with off-road equipment, including extended drain intervals, reduced engine wear and ability to extend engine rebuild ...

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 ...

A new generation of heavy-duty diesel engine oil is headed our way in the next 12 to 18 months. Known currently as PC-12, or Proposed Category 12, the oils under development through the American ...

The American Petroleum Institute (API) announced progress in the development of its new Proposed Category 12 (PC-12) heavy-duty engine oil specification, clearing several key steps toward formal ...

Two new diesel engine oil categories, replacing the oils used in diesel engines for over a decade, came to market in January, capping a development period nearly five years in the works. The roll out ...

API CK-4 and FA-4 diesel engine oils have been available for nearly two years, but with several combinations of categories and viscosities available, it can be difficult to decide which best fits your ...

With the transition to the new API CK-4 and FA-4 oil categories, one of the challenges is figuring out the right oils for your application. CK-4 oils, for example, are designed for both newer engines ...