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 ...

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, ...

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

For two decades, we have seen a new API oil classification for on-highway heavy duty diesels every few years. Oil formulations had to change to meet the demands of diesel engines facing ...

WASHINGTON, Sept. 26 (UPI) --The American Petroleum Institute said proper classification of crude oil is essential when considering policies for safer rail transit. In May, API said a study published ...