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:
Containing running costs and pollution
Some suggestions which may help you to keep the running costs of the vehicle
down and lower the amount of toxic emissions released into the atmosphere are given
below. ...
Menu description
The menu comprises a series of functions arranged in a “circular fashion” which
can be selected through buttons + and - for access to the different select operations
and settings (see examples “La ...
Seat Belt Maintenance
Do not bleach, dye or clean the seat belts with chemical solvents or abrasive
cleaners. This will weaken the fabric.
Sun damage can also weaken the fabric.
If the seat belts need cleaning, use a m ...