Fuel additives in the United States are regulated under section 211 of the Clean Air Act (as amended in January 1995).
The Environmental Protection Agency (EPA) requires the registration of all fuel additives which are commercially distributed for use in highway motor vehicles in the United States,[8] and may require testing and ban harmful additives.
The EPA also regularly reviews the health and net economic benefits of Clean Air Act policies.
[9] The act also requires deposit control additives (DCAs) be added to all petrol.
This in turn serves to ensure a consistent air and fuel mixture that will contribute to better gas mileage.