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 ...

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

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 ...

Truck and engine manufacturers are in the final stages of launching engines compliant with new, stricter emissions regulations, and those next-generation engines will bring with them next-generation ...

Our comprehensive guide to engine oil explains the pros and cons of each oil type and helps you decide which is best for your vehicle's engine.

Changed the engine oil using Energ 15w40 API-CK4. I found this brand, owned by NDTH, one of Delhi's old Mobil distributors.