January 1, 2027, will be the first license date for two new heavy-duty engine oil categories, if all goes as planned.

The American Petroleum Institute (API) announced progress in the development of its new Proposed Category 12 (PC-12) ...

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 ...

The API is aiming for a 2027 rollout of the new engine oil spec, which is meant to enhance performance standards.

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 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 ...

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 ...

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 ...

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 ...

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 ...

The American Petroleum Institute (API) has licensed approximately 400 CK-4 and more than 60 FA-4 oils submitted by large, medium, and small oil marketers. API expects CK-4 and FA-4 availability to ...