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:
Front Windshield Wiper Operation
There are five different modes of operation for the front windshield wipers.
The windshield wiper lever can be raised or lowered to access these modes:
Windshield Wiper
Operation
Windshield Wip ...
Conditions of use
Cold starting
Short journeys and frequent cold starts do not allow the engine to reach optimum
operating temperature. This results in a significant increase in consumption levels
(from +15 to +30 ...