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:
Instrument Cluster — Base
Instrument Cluster — Base ...
Cleaning The Instrument Panel Cupholders
Removal
Pull the flexible liner from the cupholder drawer starting
at one edge to ease removal.
Cleaning
The liner is top shelf dishwasher safe, or you may follow
the cleaning procedure below.
...
Recirculation
When outside air contains smoke, odors, or
high humidity, or if rapid cooling is desired,
you may wish to recirculate interior air by
pressing the Recirculation control button. The
recircula ...