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:
Petrol engines
Use only unleaded petrol.
To prevent errors, the diameter of the fuel tank filler is too small to introduce
a lead petrol pump filler. Use petrol with a rated octane number (R.O.N.) not lower
tha ...
EOBD system
The EOBD system (European On Board Diagnosis) allows continuos diagnosis of the
components of the car correlated with emissions.
It also alerts the driver, by the turning on of the warning light
...
If an interior light burns out
Modifications or repairs to the electrical system carried out incorrectly
and without bearing the features of the system in mind can cause malfunctions with
the risk of fire.
See “If a bulb burn ...