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 ...

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 ...

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 next-gen heavy-duty engine oil standard (PC-12) has been formally approved, announced the American Petroleum Institute, which also introduced the new CL-4 and FB-4 “donut” certification marks ...

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 (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 ...

Two new diesel engine oil categories, replacing the oils used in diesel engines for over a decade, came to market in January, capping a development period nearly five years in the works. The roll out ...

PC-12 has been fully approved by API and will replace CK-4 and FA-4 engine oils starting in 2027. The new engine oil category includes FB-4 for lower-viscosity oils and CL-4 for higher-viscosity ...

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 best synthetic oils offer more mileage, keep the engine cleaner, perform equally well in low and high temperatures, and protect your engine by keeping wear at bay. When it comes to the topic of ...