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:
Instrument Cluster
Instrument Cluster Descriptions ...
Fuel cut-off switch (FIS)
It is located under the dashboard on the front right-hand door pillar and it
comes into operation in the case of an accident to block the supply of fuel thereby
stopping the engine.
Carefully i ...
Passenger’s front air bag (where provided)
It consists of an instant-inflating cushion contained in a special recess in
the dashboard; its volume is bigger than the driver’s one.
The driver’s and passenger’s front Air bags have been desig ...