The broadest classification typically requires the use of motor oils that adhere to standards set by the API – that is, the American Petroleum Institute.

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 ...

HOUSTON, Tex. – The American Petroleum Institute recently established new performance standards for its CI-4 category, requiring qualifying oils to handle soot better and improve shear control, in ...

The API And Its Classifications As the largest trade association for the United States oil and natural gas industry, the American Petroleum Institute works with the public and private sectors to ...

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 ...

HOUSTON, Tex. – The American Petroleum Institute recently established new performance standards for its CI-4 category, requiring qualifying oils to handle soot better and improve shear control, in ...

The American Petroleum Institute said proper classification of crude oil is essential when considering policies for safer rail transit.

“API is pleased to collaborate with the AEC to expand use of our world-class standards and programs to help enhance the safety, transparency and sustainability of natural gas and oil operations ...

API-licensed products designated API CI-4 will become available in August 2002. API CI-4 oils are pivotal components in maintaining diesel engine durability using cooled EGR. API CI-4 is a higher ...

There's a lot of information on the packaging for your engine's motor oil, but the S designation may be one of the most important to look for.