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 ...

API CK-4 and FA-4 diesel engine oils have been available for nearly two years, but with several combinations of categories and viscosities available, it can be difficult to decide which best fits your ...

A new donut is being baked. Two, to be exact. The American Petroleum Institute’s Lubricants Group has established a New Category Development Team to launch the test-development phase of what will be a ...

It’s too early in the game to officially say that the fuel efficiency promise of the newly rolled out API FA-4 oil-service category has been met. On the other hand, there is enough research already in ...

A new generation of heavy-duty diesel engine oil is headed our way in the next 12 to 18 months. Known currently as PC-12, or Proposed Category 12, the oils under development through the American ...