2014 SKODA OCTAVIA open gas tank

Inspecting and replenishing
Fuel
Introduction
This chapter contains information on the following subjects:
Petrol and diesel refuelling
188
Lead-free petrol
189
Diesel fuel
190
Refuelling with CNG (compressed natural gas)
191
CNG
192
The correct fuels for your vehicle are specified on the inside of the fuel filler
flap » Fig. 180 on page 188 .
WARNING■
Observe the local regulations regarding fuel handling.■The operating instructions of the refuelling system must always be fol-
lowed.■
Do not smoke when refuelling and do not use a mobile phone.
■
The fuel and fuel vapours are explosive - risk to life!
CAUTION
■ Never drive until the fuel tank is completely empty! The irregular supply of
fuel can cause misfiring, which can result in damage to parts of the engine and
the exhaust system.■
Immediately remove any fuel that has spilled onto the vehicle's paintwork –
risk of paint damage!
■
If the vehicle was not purchased in the country where it was intended to be
operated, you should check whether the fuel specified by the manufacturer is
offered in the country where the vehicle will be operated. You should also per-
haps check whether the manufacturer has recommended a different fuel for
operation of the vehicle in the corresponding country. If no prescribed fuel is
available, then you must check whether it is permitted by the manufacturer to
operate the vehicle with another fuel type.
Petrol and diesel refuellingFig. 180
Open fuel filler flap/unscrew tank cap/place the tank cap on the
fuel filler flap
Fig. 181
Fuel filler tube on vehicles with
diesel engines
Read and observe and on page 188 first.
Refuelling can be done if the following conditions are met.
The vehicle is unlocked.
The engine and the ignition are switched off simultaneously.
The auxiliary heating and ventilation is switched off » page 122.
›
Press on the fuel filler flap in the direction of arrow
1
» Fig. 180.
›
Open the flap in the direction of arrow
2
.
›
Unscrew the tank cap in the direction of arrow
3
.
›
Remove the tank cap and place in the recess on top of the fuel filler flap in
the direction of arrow
4
.
›
Insert the pump nozzle into the fuel filler neck as far as it will go, and refuel.
The fuel tank is full just as soon as the pump nozzle switches off for the first
time »
. 
188General Maintenance

CAUTION■Just filling the tank once with diesel fuel that does not comply with the
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-
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.
CAUTION
■ The vehicle cannot be operated with bio fuel RME, therefore this fuel must
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
agents) into the diesel. This can result in considerable damage to parts of the
engine or the exhaust system.
Refuelling with CNG (compressed natural gas)
Fig. 182
Natural gas filler tubes
Read and observe
and on page 188 first.
Natural gas refuelling can be carried out if the following conditions are met. The vehicle is unlocked.
The engine and the ignition are switched off.
The auxiliary heating and ventilation is switched off » page 122.
The gas filler tube for refuelling with natural gas is located behind the fuel fill- er flap next to the petrol filler tube.
The filling couplings of the natural gas refuelling systems may differ in han-
dling. When refuelling with natural gas at unfamiliar refuelling systems, you
should seek help from trained fuel station staff. If unsure, have the refuelling done by trained fuel station staff.
Open fuel filler flap›
Open the fuel filler flap.
›
Remove cap
A
» Fig. 182 from gas filler tube
B
in direction of the arrow.
›
Plug the filling coupling of the refuelling system on the gas filler tube
B
.
The fuel tank is full when the compressor of the refuelling system automati-
cally switches off. To stop the refuelling operation prematurely, press the
“Stop ” button of the refuelling system.
Closing the filler cap
›
Check that sealing ring
C
» Fig. 182 has remained inserted in the gas filler
tube.
If sealing ring
C
has slipped onto the filling coupling, reinsert it into the gas
filler tube.
›
Plug the cap
A
onto the gas filler tube.
›
Close the bonnet.
The natural gas refuelling systems have an overfill protection relating to the
outdoor temperature. At very high outside temperatures, it may happen that
the gas tank may not be fully refuelled.
The natural gas system of your vehicle is suitable both for “slow fuelling” (fuel-
ling from small compressors) and for “quick fuelling” (fuelling from natural gas
stations with large compressors).
If the vehicle is parked for a longer period of time immediately after refuelling,
the situation may arise in which the pointer of the fuel tank gauge does not
indicate exactly the same level as was the case immediately after refuelling
when the engine is restarted. This is not due to any system leakages but a
drop in pressure in the natural gas fuel tank due to technical reasons after a
cooling phase directly after refuelling.
The maximum lifetime of the gas tank is 20 years.
The capacity of the natural gas fuel tank is approximately 15 kg.
The capacity of the gasoline fuel tank is about 50 litres, of which about 6
lighters are in reserve. 
191Inspecting and replenishing

WARNING■When refuelling, never get into the vehicle. If you have to get into your
vehicle in exceptional cases, touch a metal surface before you touch the
filling coupling again. This will avoid electrostatic discharges, which may
generate sparks. Sparks can cause a fire during refuelling.■
Natural gas is highly explosive and highly flammable.
Note
During the filling process sounds are heard which are harmless. If you are un-
sure which service station staff to use, ask the petrol station staff.
CNG
Fig. 183
Position of the CNG label(s).
Read and observe
and on page 188 first.
A G-TEC-vehicle may be operated with CNG and petrol.
In some countries, national legislation requires that vehicles with CNG opera-
tion be identified by one of the listed labels » Fig. 183.
Position of the CNG label » Fig. 183.
Natural gas quality and consumption
Depending on the natural gas supplier, the natural gas quality (heating value)
may vary. The engine control unit adjusts automatically to the natural gas
quality.
Automatically switching over from natural gas mode to petrol mode
The vehicle automatically switches from natural gas to petrol, for example, if
one of the following cases occurs.
› With an empty gas tank or not enough pressure in the tank.
› After refuelling with natural gas.
› At very low surrounding temperatures.
Gas smell
If you smell gas, proceed as follows.
› Stop the vehicle.
› Put out cigarettes.
› Switch off the ignition.
› Open the doors and the boot lid to ventilate the vehicle sufficiently.
› Remove any spark-producing or incendiary items from the vehicle and switch
off immediately.
› Do not continue to drive if the odour persists.
Seek help from a specialist garage to correct the gas system fault.
Regular gas system checks must be carried out at a specialist workshop on natural gas-powered vehicles.WARNINGWhen operating a CNG-powered vehicle, the national legal requirements
must be observed.WARNINGDo not underestimate the smell of gas in the car or when refuelling - risk of
fire, explosion and injury.
Engine compartment
 Introduction
This chapter contains information on the following subjects:
Opening and closing the bonnet
194
Engine compartment overview
194
Radiator fan
195
Windscreen washer system
195

192General Maintenance