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

If you've ever bought a quart of motor oil for your vehicle, you've likely encountered the letters API somewhere on the label. In fairness, there are a lot of abbreviations, symbols and odd number ...

A new donut is being baked. Two, to be exact. The American Petroleum Institute’s Lubricants Group has established a New Category Development Team to launch the test-development phase of what will be a ...

Engine oil is the lifeblood of an engine, directly influencing its longevity, efficiency, and performance. Yet many drivers remain unsure about what those numbers and letters—like 0W-20 or API ...