All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or other additives is not needed under normal conditions and would result in additional cost. Therefore you should not have to add anything to the fuel.
See also:
Central vents
(A) - Air flow opening/closing control. ...
Rear Window Features
Rear Window Defroster
The rear window defroster button is located in the center of the instrument panel,
below the radio.
Press this button to turn on the rear window defroster.
An indicator in ...
External lights
The left-hand stalk controls the external lights and the direction indicators.
The external lights can only be switched on when the ignition key is at MAR. ...