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

Diesel fuel additives
The diesel fuel in accordance with the prescribed standards meets all the con-
ditions 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
Just filling the tank once with diesel fuel that does not comply with the
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standard, can cause severe damage to parts of the engine, the fuel and ex-
haust system!
If a different fuel other than diesel fuel, which complies to the above men-
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tioned standards (e.g. petrol) is used, do not start the engine or switch on the
ignition! Extensive damage to engine parts can occur!
Water which has collected in the fuel filter can cause engine faults.
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CAUTION
The vehicle cannot be operated with bio fuel RME, therefore this fuel must
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not be filled in the tank and used for driving the vehicle. The use of biofuel
RME can cause considerable damage to parts of the engine or fuel system.
Do not mix any fuel additives, so-called "flow improvers" (petrol and similar
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agents) into the diesel. This can result in considerable damage to parts of the
engine or the exhaust system.

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.
WARNING
Regular gas system checks must be carried out in order to operate a nat-
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ural gas vehicle. The vehicle owner is responsible for properly conducted
tests.
Always switch off the ignition in case of an accident or vehicle fire!
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It is prohibited to drive into automatic car washes, enclosed storage pla-
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ces, garages and similar areas where it is specifically forbidden to enter
with CNG vehicles.
WARNING
If a fault occurs or a leak in the natural gas system is suspected or if you
smell gas, proceed as follows.
Stop immediately and switch off the ignition (this will close the solenoid
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valves on the natural gas tanks automatically).
Open the doors to ventilate the vehicle sufficiently.
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Immediately extinguish cigarettes, and remove and switch off other
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spark- or fire-causing objects from the vehicle immediately.
Seek help from a specialist garage to correct the gas system fault.
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188
WARNING
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The following are considered faults on the gas system.
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Gas leakage from any part of the gas system as well as an error on the
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189 ventilation system.
Continuous gas venting through the safety valves.
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Exceeding the permissible limits for contaminants in the exhaust gas.
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187
Inspecting and replenishing