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:
Using the manual gearbox
To engage the gears, press the clutch pedal fully and shift the gear lever into
one of the required positions (the diagram is shown on the knob).
IMPORTANT The car can only be put into reverse ge ...
Steering Wheel Audio Controls
The remote sound system controls are located on the rear surface of the steering
wheel. Reach behind the wheel to access the switches.
Remote Sound System
Controls (Back View Of Steering Wheel)
...
Wing window
IMPORTANT
Open and close the wing window only when the vehicle is stationary.
The Fiat Doblò may fit a handy wing window on the roof on the back of the load
compartment to carry long object ...