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 transition to CL-4 oils is expected to be backward-compatible, but FB-4 use may depend on OEM approvals for specific engines and applications. Tanks and bottles of heavy-duty diesel engine oil ...

The American Petroleum Institute (API) has licensed approximately 400 CK-4 and more than 60 FA-4 oils submitted by large, medium and small oil marketers. While already significant, API expects ...

Although sales of electric vehicles (EVs) are continuing to grow around the world and are expected to keep rising in many markets, including in the United States, the overwhelming majority of the ...

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 ...