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 ...

Come December, you’ll see a new API oil classification with lower-viscosity parameters designed to be used in the next generation of fuel-efficient engines. In fact, you’ll see two different oil ...

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 ...