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 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, ...

American Petroleum Institute (API) announced the approval of improved performance standards for engine oils that will provide greater protection and fuel efficiency for today’s gasoline-engine-powered ...

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 ...

Diesel engines work under extreme heat, pressure, and soot, demanding oils with specialized additives, viscosity grades, and API certifications. Choosing the right oil isn’t just about brand ...

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 ...

January 1, 2027, will be the first license date for two new heavy-duty engine oil categories, if all goes as planned. Ad Loading... An update from the American Petroleum Institute said it has made ...

The American Petroleum Institute (API) announced that the new PC-12 heavy-duty engine oil category has been formally approved. “To support the next generation of heavy-duty engine technology and ...

Friction is the enemy of efficiency. At least that’s the case in internal combustion engines. That's why oil is such an important ingredient to the longevity of an engine’s life, as well as its ...