Opel 2011 Zafira Owner's Manual page 151

The capacity of the natural gas tank
depends on outside temperature,
filling pressure and type of refuelling
system.
Terms for "natural gas vehicles"
abroad:
German Erdgasfahrzeuge
English NGVs = Natural Gas
Vehicles
French Véhicules au gaz naturel –
or – Véhicules GNV
Italian Metano auto
Terms for "natural gas" abroad:
German Erdgas
English CNG = Compressed
Natural Gas
French GNV = Gaz Naturel (pour)
Véhicules - or -
CGN = carburantgaz
naturel
Italian Metano (per auto)
Fuel filler cap
Only use genuine fuel filler caps.
Diesel-engined vehicles have special
fuel filler caps.
Fuel consumption - CO
Emissions
The determination of fuel
consumption is regulated by
European directive 80/1268/EEC
(latest edition 2004/3/EC).
The directive is oriented to actual
driving practices: Urban driving is
rated at approx. 1 / and extra urban
3
driving with approx. / . Cold starts
2
3
and acceleration phases are also
taken into consideration.
The specification of CO emission is
2
also a constituent of the directive.
The figures given must not be taken
as a guarantee for the actual fuel
consumption of a particular vehicle.
Furthermore, fuel consumption is
dependent on personal driving style
as well as road and traffic conditions.
Driving and operating
All values are based on the EU base
model with standard equipment.
The calculation of fuel consumption
takes into account the vehicle's kerb
weight, ascertained in accordance
with the regulations. Optional
-
2
equipment may result in slightly
higher fuel consumption and
CO emission levels and a lower
2
maximum speed.
Fuel consumption, CO
3 208.
Natural gas
The fuel consumption information
was obtained using reference fuel
G20 (methane proportion
99 - 100 mol%) under prescribed
driving conditions. When using
natural gas with a lower proportion of
methane, the fuel consumption can
differ from the specified values.
151
emissions
2
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