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:
Audio repetition (Audio Rpt.) (where provided)
With this function the display repeats information relevant to the Radio (selected
radio station frequency or RDS message, automatic tuning or AutoSTore), audio CD
(track number).
...
Fluids and lubricants
PRODUCTS WHICH MAY BE USED AND THEIR CHARACTERISTICS
(*) For very low temperatures, we recommend SELENIA MULTIPOWER.
(**) For very low temperatures, we recommend SELENIA WR. ...
Automatic Operation
1. Press the AUTO button on the Automatic Temperature Control (ATC) Panel, the
indicator will illuminate when on.
2. Next, adjust the temperature you would like the system to maintain by adjusting ...