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 are not needed under normal conditions and would result in additional cost.

Therefore you should not have to add anything to the fuel.

    See also:

    Extreme Cold Weather (Below –20°F Or –29°C)
    To ensure reliable starting at these temperatures, use of an externally-powered electric engine block heater (available from your authorized dealer) is recommended. ...

    Going & Stopping
    Driving the V-6 Grand Cherokee reminded me that the laws of physics can't be changed. The SUV uses Chrysler's new Pentastar 3.6-liter V-6 rated at 290 horsepower and 260 pounds-feet of torque, but ...

    Auto Up Feature With Anti-Pinch Protection — If Equipped
    On some models, the driver’s and front passenger’s (if equipped for passenger side) power window switches have an “Auto Up” feature. Pull the window switch fully upward to the second det ...