Natural Gas Vehicles (Compressed Natural Gas) - Skoda citigo Owner's Manual

Fuel additives
Unleaded petrol in accordance with the EN 228 standard
tions for a smooth-running engine. We therefore recommend that no fuel ad-
ditives are used. This can result in considerable damage to parts of the engine
or the exhaust system.
CAUTION
Even filling the tank with petrol that does not meet the standards once can
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lead to serious damage to parts of the exhaust system!
If a fuel other than unleaded fuel which complies to the above mentioned
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standards (e.g. leaded petrol) is used by mistake, do not start the engine or
switch on the ignition! Extensive damage to engine parts can occur!
CAUTION
If, in an emergency, the vehicle has to be refuelled with petrol of a lower oc-
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tane number than the one prescribed, the journey must only be continued at
medium engine speeds and a low engine load. Driving at high engine revs or a
high engine load can severely damage the engine! Refuel using petrol of the
prescribed octane number as soon as possible.
Engine parts can be damaged if petrol with a lower octane number than the
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one prescribed is used.
Even in the event of an emergency, petrol of a lower octane number than 91
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RON must not be used, otherwise the engine can be severely damaged!
CAUTION
In no case may fuel additives with metal components be used, especially not
with manganese and iron content. There is a risk of causing considerable dam-
age to parts of the engine or exhaust system!
CAUTION
Do not use fuels with metal components, such as LRP (lead replacement
petrol) may be used. There is a risk of causing considerable damage to parts of
the engine or exhaust system!
1)
In Germany, DIN 51626-1 or E10 for unleaded gasoline with octane number 95 and 91.
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General Maintenance
Note
meets all the condi-
1)
Unleaded petrol that has a higher octane number than that required by the
■
engine can be used without limitations.
On vehicles using prescribed unleaded petrol of min. 95 RON, the use of pet-
■
rol with a higher octane number than 95 RON can increase the power and re-
duce fuel consumption.

Natural gas vehicles (compressed natural gas)

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Introduction
This chapter contains information on the following subjects:
Refuelling - natural gas
Automatic switching from CNG to petrol mode
Regular gas system checks
Safe natural gas
Natural gas quality and consumption
CNG labels
Natural gas is an alternative fuel for motor vehicles. It belongs to those fuels
which show the lowest emissions.
Natural gas is odourless and lighter than air. For security reasons, this is satu-
rated with odour-intensive substances.
For frequent short-haul traffic, especially at low outside temperatures, the ve-
hicle is driven more frequently in petrol mode than in natural gas mode.
The maximum lifetime of the gas tank is 20 years.
WARNING
When operating a CNG-powered vehicle, the national legal requirements
must be observed.
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