If you've ever bought a quart of motor oil for your vehicle, you've likely encountered the letters API somewhere on the label. In fairness, there are a lot of abbreviations, symbols and odd number ...

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 ...

There's a lot of information on the packaging for your engine's motor oil, but the S designation may be one of the most important to look for.

API Approves Development of PC-12 Diesel Engine Oil Category Fleets and drivers should expect improved oil performance, which supports enhanced engine durability and aids in meeting regulations.

The Product has obtained API (American Petroleum Institute) SP certification*1, making it the world's first*2 engine oil with racing performance*3 and API SP certification using a plant-based raw ...

Gen III then submitted its first Group III based 5 W-30 PCMO formulation and ReGen III product to API’ s Engine Oil Licensing and Certification System.

API CI-4 oils are pivotal components in maintaining diesel engine durability using cooled EGR. API CI-4 is a higher quality oil than the previous diesel oil categories, so it will provide engine ...