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

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 ...

The American Petroleum Institute (API) says it has licensed approximately 400 CK-4 oils and more than 60 FA-4 oils submitted by marketers, making the robust new classifications available to operators ...

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 ...

When licensing and distribution begin for the two new heavy-duty diesel engine oils in December, it’s paramount for fleets and owner-operators to be aware of the new categories and ensure they’re ...

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 ...

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 ...

Ram trucks have been using the 6.7L Cummins diesel engine for almost two decades. Here is its oil capacity and why the model ...

Of all the advanced technologies that have impacted the automobile, some of the most significant, and perhaps the most seldom recognized, are the advancements in lubricants. And while modern engines, ...