Materials Added To Fuel
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 they would result in additional cost.
Therefore, you should not have to add anything to the fuel.
See also:
Setting the Tone, Balance, and Fade
Push the rotary TUNE/SCROLL control knob and BASS
will display. Turn the TUNE/SCROLL control knob to
the right or left to increase or decrease the bass tones.
Push the rotary TUNE/SCROLL control ...
REVERSE
This range is for moving the vehicle backward. Shift into
REVERSE only after the vehicle has come to a complete
stop. ...
SCAN Button
Pressing the SCAN button causes the tuner to search for
the next channel, pausing for eight seconds before continuing
to the next. To stop the search, press the SCAN
button a second time. ...