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:
Tire Rotation Recommendations
The tires on the front and rear of your vehicle operate at different loads and
perform different steering, driving, and braking functions. For these reasons, they
wear at unequal rates and tend to ...
Adjusting the headlight beam
Proper adjustment of the headlight beams is of vital importance for your safety
and comfort and also for the other road users. It is also a specific regulation
of the road traffic code. To ensur ...
Controls
(A): Air temperature knob (mixing hot and cold air);
(B): Air recirculation on/off button;
(C): Fan knob and climate control system on/off;
(D): Air distribution knob. ...