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 ...

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 ...

In addition to its range of environmentally friendly car cleaning products, Green Earth Technologies announced it's been granted the "Donut" - an API Service Symbol for the SAE 5W-30 weight of its ...