U.S. crude oil futures inched up from post-settlement levels Tuesday after the American Petroleum Institute showed a much larger draw than expected in U.S. weekly crude supplies.

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 ...

U.S. crude oil futures were little changed from post-settlement levels Tuesday after the American Petroleum Institute reported a fall in domestic crude inventories.

It’s show time at last for the producers of motor oils developed through the API Proposed Category 11 process. PC-11 was launched in 2011 to develop specs for a new oil-service category to succeed the ...

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 ...

Three years from now, you'll see a new API diesel engine oil-service category, designed to help meet federal greenhouse gas/fuel economy standards, which have a final phase-in date set for model year ...

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 ...

The American Petroleum Institute (API) has estimated a major crude oil inventory build of 10.45 million barrels for the week ending October 10—compared to analyst expectations of a much smaller ...