Fuels, Refuelling - Vauxhall SIGNUM Owner's Manual

188 Driving and operation

Fuels, refuelling

Fuel consumption
Fuel consumption is determined under
specific driving conditions – see page 283.
Special equipment increases the weight of
the vehicle. As a result, they can increase
fuel consumption and reduce the specified
maximum speed.
For the first few thousand miles, friction
between the engine and transmission
components is higher. This increases fuel
consumption.
Fuel for petrol engines
Normal commercial high-quality fuels with
a maximum ethanol content of 5% in
accordance with DIN EN 228 are suitable
(for catalytic converter see page 190, for
octane numbers see pages 280, 281). The
quality thereof has considerable effect on
the performance, running and service life
of the engine. The additives mixed with the
fuel are extremely important. For this
reason you must only refuel with high-
quality fuels containing additives.
Fuels with ethanol content greater than 5%
do not comply with DIN EN 228 and must
not be used unless the vehicle has been
specifically developed and approved for
these fuels.
Fuel with too low an octane number can
cause pinking. Vuaxhall cannot be held
liable for resulting damage.
Petrol with a higher octane number can
always be used.
The use of 91 octane fuel is not permitted
1)
in vehicles with engine Z 22 YH .
The ignition timing adjusts automatically
to the grade of fuel used (octane
number) – see pages 280, 281.
Use of petrol with an octane rating of 95
will ensure economical driving.
Fuel for diesel engines
Diesel engines must be operated only on
commercially available diesel fuel meeting
the specifications of DIN EN 590. Do not
use marine diesel oils, heating oils or
entirely or partially plant-based diesel
fuels, such as rape seed oil or bio diesel,
Aquazole and similar diesel-water
emulsions.
1)
Sales designation – see page 280.
The flow and filterability of diesel fuel are
temperature-dependent.
Diesel fuels with improved low-
temperature properties are therefore
available on the market during the winter
months. Make sure that you fill the tank
with winter fuel before the start of the cold
weather season.
Additives can be used with diesel fuels with
winter properties that are guaranteed by
the manufacturer and when using diesel
fuel filters that are heated depending on
the outside temperature.
Diesel fuels must not be diluted with fuels
that are intended for petrol engines.
Fuel filler cap
When replacing the fuel filler cap, be sure
to use a genuine fuel filler cap for your
model to ensure full functionality. Diesel-
engined vehicles have special fuel filler
caps.