It is usually added to gasoline in concentration of around 1.3% volume to avoid high gum levels that can cause increased carbon deposits in engine parts [citation needed].

Higher concentrations are permitted by most regulatory agencies if a detergent and a fuel combustion modifier are added to the component to keep gum formation from happening.

should not intentionally be added in gasoline.”[5] N-Methylaniline as is (neat) does not appear on the U.S. Environmental Protection Agency’s (EPA) List of Registered Gasoline Additives.

However, registration can be obtained at higher concentration which maximum authorized dosage depends on a suitable detergent and an effective fuel combustion modifier added to this component.

Because it is not an oxygenate NMA does not appear on the list of recommended oxygenates under category 4 of the Worldwide Fuel Charter published by the European Automobile Manufacturers Association (ACEA), which refers to emission standards for unleaded gasoline for “markets with advanced requirements for emission control.” Under policies that are specific to those countries NMA is banned in China and Russia.