The American Petroleum Institute, or API, has specific standards that it sets for all motor oils and vehicle emissions to help owners comply with clean air standards and other initiatives. API motor oil standards are strict yet easy to maintain. They are designed so that not too many ingredients in motor oils get out into the atmosphere, potentially damaging the air we breathe and the plants and wildlife we live with.
By adhering to these strict yet fair API motor oil standards, drivers across the United States can feel better knowing their cars and trucks are running on motor oil that will not significantly harm the environment. Also, those adhering to API motor oil standards often report an enhancement in how their vehicles run. So they help the ecosystem by not putting anything to harmful in it, and they get smoother-running vehicles in the process.