Heavy-duty engine oil marketers can begin finalizing formulations and preparing product packaging to meet the new oil ...

API Service Category CL-4 and API FB-4 'Donut' certification marks enable oil marketers to align with 2027 heavy-duty engine standards.

API PC-12 oil specification approved with CL-4 and FB-4 marks available ahead of 2027 licensing and new engine oil performance standards.

API okays new diesel engine oils for model year 2027. Plus, two fleet owners among four sentenced in USPS bribery scheme; ...

The transition to CL-4 oils is expected to be backward-compatible, but FB-4 use may depend on OEM approvals for specific ...

It’s an advanced, next-generation engine oil standard focusing on ultra-low viscosity oils for modern engines. When purchasing oil, look for the API Service Symbol "Donut" on the label, which is an ...

The American Petroleum Institute's new diesel engine oil-service categories, API CK-4 and FA-4, will begin appearing in the marketplace on Dec. 1. API has developed two visually different API Service ...

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 ...

The Engine Manufacturers Association (EMA) made a request earlier this year to the Diesel Engine Oil Advisory Panel (DEOAP) of the American Petroleum Institute (API) to initiate development of a new ...

The American Petroleum Institute will introduce a special Service Symbol Donut to help consumers identify the newly-approved FA-4 (PC-11) diesel engine oil. API approved two new diesel oil standards, ...