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:
Safety
The Fiat Doblò is designed and built to achieve the highest levels of safety.
It is the result of the many devices offered (standard or optional according to
market or outfit) starting from ...
Diesel particulate filter clogged
(1.3 Multijet 85 HP and 1.9 Multijet 120 HP versions) (Amber)
diesel particulate filter is clogged and the driving conditions do not enable
to activate automatically the reclaiming procedure.
To ...
Jacking the car
WITH THE JACK
See “If a tyre is punctured” in this section.
WITH A SHOP JACK
From the front
Jack up the car only by positioning the jack arm at the gearbox/differential
and placing a rubber ...