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 ...

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 ...

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.

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 ...