2015 SKODA OCTAVIA engine

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.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. 202
Position of the CNG label(s).
Read and observe
and on page 189 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 labels » Fig. 202.
Position of the CNG label » Fig. 202.
Natural gas quality and consumption
Depending on the natural gas supplier, the natural gas quality (heating value) may vary. The engine system 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.
Use all the petrol in the fuel tank at lease once every six months until the
warning light 
illuminates and then refill with petrol. This is to ensure that
the fuel system functions correctly and to preserve the quality of the fuel.
Gas leak
If a gas leak is suspected (noticeable odour), proceed as follows. ▶ Stop the vehicle.
▶ Switch off the ignition.
▶ Put out any cigarettes, remove any spark-producing or incendiary items from
the vehicle and immediately switch the engine off.
▶ Open the doors and the boot lid to ventilate the vehicle sufficiently.
▶ Do not continue to drive if the odour persists.
▶ If it is not possible to leave an enclosed area with a vehicle with a gas leak
(e.g. in a tunnel, underpass, garage, ferry, etc.), call the emergency services
immediately.
Seek help from a specialist garage to correct the gas system fault.
In a traffic accident
If a gas leak is suspected in a traffic accident, proceed as follows.
▶ Switch off the ignition.
▶ Put out any cigarettes, remove any spark-producing or incendiary items from
the vehicle and immediately switch the engine off.
▶ Have all the occupants get out.
▶ Prevent people walking past/standing in the immediate vicinity of the acci-
dent vehicle. We recommend standing at least 10 metres from the vehicle.
▶ Inform the emergency services that it is a natural gas vehicle.
Regular gas system checks
Regular gas system checks must be carried out in a specialist workshop on
natural gas-powered vehicles. The vehicle owner is responsible for ensuring
tests are conducted properly. 193Inspecting and replenishing

Every 2 years
▶ Check the filler cap.
▶ Check the condition of fuel filler tubes and the sealing ring in the fuel filler
tubes, and clean the sealing ring if necessary.
▶ Check the gas system for leaks.
Every 4 years
▶ Inspect the gas tank.
Every 20 years ▶ Replace the gas tank.WARNING■ Do not underestimate the smell of gas in the car or when refuelling - risk
of fire, explosion and injury.■
The natural gas tanks in the vehicle must not be exposed to unwanted
heat sources.
Engine compartment
 Introduction
This chapter contains information on the following subjects:
Opening and closing the bonnet
195
Engine compartment overview
196
Radiator fan
196
Windscreen washer system
196WARNINGWhen working in the engine compartment, injuries, scolding, accident or
fire hazards may arise. For this reason, it is essential to comply with the
warning instructions stated below and with the general applicable rules of
safety. The engine compartment of your car is a hazardous area!WARNINGInstructions before beginning work in the engine compartment■Turn off the engine and remove the ignition key.■
Firmly apply the handbrake.
■
For vehicles with manual transmission the lever into the neutral position.
WARNING (Continued)■ On vehicles with automatic transmission, shift the selector lever into the
P position.■
Allow the engine to cool.
■
Never open the bonnet if you can see steam or coolant flowing out of the
engine compartment – risk of scalding! Wait until the steam or coolant has
stopped escaping.
WARNINGInformation for working in the engine compartment■Keep all people, especially children, away from the engine compartment.■
Never touch the radiator fan. The fan might suddenly start running!
■
Do not touch any hot engine parts – risk of burns!
WARNINGInformation for working in the engine compartment with the engine run-
ning■
Pay particular attention to moving engine parts, e.g. V-ribbed belt, gener-
ator, radiator fan - danger to life!
■
Never touch the electric wiring on the ignition system.
■
Avoid short circuits in the electrical system, particularly on the vehicle's
battery.
■
Always make sure that no jewellery, loose clothing or long hair can get
caught in rotating engine parts – risk of death! Always remove any jewel-
lery, tie back long hair and wear tight fitting clothing before completing any
work.
WARNINGInformation for working on the fuel system or the electrical system■Always disconnect the vehicle battery from the electrical system.■
Do not smoke.
■
Never work near open flames.
■
Always have a functioning fire extinguisher nearby.
WARNING■ Read the information and warning instructions on the fluid containers.■Keep the working fluids in sealed original containers and safe from peo-
ple who are not completely independent, e.g. children. 194General Maintenance

WARNING (Continued)■Never spill operating fluids over the hot engine - risk of fire.■If you wish to work under the vehicle, you must secure the vehicle from
rolling away and support it with suitable supporting blocks: the car jack is
not sufficient for this – risk of injury!
CAUTION
Always top up using the correct specification of fluids. This may result in major
operating problems and also vehicle damage!
For the sake of the environment
In view of the requirements for the environmentally friendly disposal of fluids and the special tools and knowledge required for such work, we recommend
that fluids be changed by a specialist garage.
Note
■ Please consult a specialist garage for any questions relating to fluids.■Fluids with the proper specifications can be purchased from the ŠKODA Origi-
nal Accessories or from the ŠKODA Genuine Parts ranges.
Opening and closing the bonnet
Fig. 203
Open the bonnet
Read and observe
and on page 194 first.
Open flap
›
Open the front door.
›
Pull the release lever underneath the dash panel in the direction of the ar-
row
1
» Fig. 203 .
Before opening the bonnet, ensure that the arms of the windscreen wipers
are correctly in place against the windscreen, otherwise the paintwork on the
flap could be damaged.›
Push the release lever in the direction of arrow
2
.
The bonnet is then unlocked.
›
Grasp the bonnet catch and lift in the direction of arrow
3
.
›
Remove the lid prop in the direction of arrow
4
from the holder.
›
Secure the open flap inserting the end of the post into the opening in the di-
rection of arrow
5
.
Close the flap
›
Lift the bonnet.
›
Decouple the bonnet support and press into the holder designed to hold it.
›
Let the bonnet drop into the lock carrier lock from a height of around 20 cm – do not push it in!
WARNING■
Check whether the bonnet has been closed properly. Also make sure that
a vehicle with an opened bonnet does not appear in the instrument cluster
display » page 40 .■
If you notice that the lock is not properly engaged while driving, stop the
vehicle immediately and close the bonnet – risk of accident!
■
Make sure that when closing the bonnet, no body parts are crushed -
there is danger of injury!
195Inspecting and replenishing

Engine compartment overviewFig. 204
Principle sketch: Engine compartment
Read and observe
and on page 194 first.
Layout of the engine compartment » Fig. 204
Coolant expansion reservoir
199
Engine oil dipstick
198
Engine oil filler opening
198
Brake fluid reservoir
200
Battery (below a cover)
201
Windscreen washer fluid reservoir
196
Note
The location of the inspection points in the engine compartment of petrol and
diesel engines is practically identical.
Radiator fan
Read and observe
and on page 194 first.
The radiator fan is powered by an electric motor. Operation is controlled ac-
cording to the temperature of the coolant.
ABCDEFWARNINGAfter switching off the ignition, the fan can intermittently continue to oper-
ate for approx. 10 minutes.
Windscreen washer system
Fig. 205
Windscreen washer fluid reser-
voir
Read and observe and on page 194 first.
The windscreen washer fluid reservoir
A
is located in the engine compart-
ment » Fig. 205 .
The cleaning fluid is provided for the cleaning of the front and rear window as
well as the headlight.
The capacity of the reservoir is about 3 litres or about 4.7 litres on vehicles that
have a headlight cleaning system 1)
.
Clear water is not sufficient to intensively clean the windscreen and head-
lights. We recommend using clean washing water together with the screen
cleaner from the range of ŠKODA Original Accessories (in winter additionally
with antifreeze) which is capable of removing stubborn dirt.
In Winter, the washing water should always be mixed with antifreeze even if
the vehicle has heated windscreen washer nozzles.
Under exceptional circumstances, methylated spirits can also be used if no
screen cleaner with antifreeze is available. The concentration of methylated
spirits must not be more than 15 %. The freeze protection at this concentration
is sufficient only to -5 °C. 
1)
In some countries, 4.7 ltr. applies for both variants.
196General Maintenance

CAUTION■Under no circumstances must radiator antifreeze or other additives be added
to the windscreen washer fluid.■
If the vehicle is fitted with a headlight cleaning system, only cleaning prod-
ucts which do not attack the polycarbonate coating of the headlights must be
added to the windscreen washer fluid.
■
Do not remove the filter from the windscreen washer fluid reservoir when re-
plenishing it with liquid otherwise the liquid transportation system can be con-
taminated, which can cause the windscreen washer system to malfunction.
Engine oil
 Introduction
This chapter contains information on the following subjects:
Specification
197
Checking the oil level
198
Replenishing
198
The engine has been factory-filled with a high-grade oil that can be use
throughout the year - except in extreme climate zones.
The engine oils are undergoing continuous further development. Thus the in- formation stated in this Owner's Manual is only correct at the time of publica-
tion.
ŠKODA Service Partners are informed about the latest changes by the manu-
facturer. We therefore recommend that the oil change be completed by a
ŠKODA Service Partner.
The specifications (VW standards) stated in the following can be indicated sep-
arately or together with other specifications on the bottle.
The engine oil should be changed after specified service intervals » page 49.
WARNINGThe engine compartment of your car is a hazardous area. The following
warning instructions must be followed at all times when working in the en-
gine compartment » page 194.
CAUTION
Do not pour any additives into the engine oil – risk of serious damage to the
engine parts.Note■ Before a long drive we recommend that you purchase and carry with you en-
gine oil which complies with the specification for your vehicle.■
We recommend that you use oils from ŠKODA Original Accessories.
■
If your skin has come into contact with oil, it must be washed thoroughly.
Specification
Read and observe
and on page 197 first.
Vehicles with variable service intervals
Petrol enginesSpecification1.2 l/63, 81 kW TSI
VW 504 00
1.4 l/110 kW TSI1.8 l/132 kW TSI2.0 l/162, 169 kW TSIDiesel engines a)Specification1.6 l/66, 81 kW TDIVW 507 002.0 l/105, 110, 135 kW TDIa)
Engine oil VW 505 01 can optionally be used in diesel engines without a
DPF.
Vehicles with fixed service intervals
Petrol enginesSpecification1.2 l/63, 81 kW TSI
VW 502 00
1.4 l/81 kW TSI G-TEC1.4 l/110 kW TSI1.6 l./81 kW MPI1.8 l/132 kW TSI2.0 l/162, 169 kW TSIDiesel engines a)Specification1.6 l/66, 81 kW TDIVW 507 002.0 l/105, 110, 135 kW TDIa)
Engine oil VW 505 01 can optionally be used in diesel engines without a
DPF. 
197Inspecting and replenishing

CAUTION■In an emergency, another engine oil to be refilled. To prevent damage to the
engine, a maximum of 0.5 litres only of the following engine oils may be used:
■ For petrol engine models: ACEA A3/ACEA B4 or API SN, (API SM);
■ For diesel engine models: ACEA C3 or API CJ-4.
Checking the oil level
Fig. 206
Principle sketch: Dipstick
Read and observe
and on page 197 first.
The dipstick indicates the engine oil level .
Dipstick » Fig. 206
The oil level must be within this range.
The oil can be checked and topped up, if the following conditions are satisfied. The vehicle is on a horizontal surface.
The engine operating temperature is reached.
The engine is turned off.
The bonnet is open.
Checking the level
›
Wait a few minutes until the engine oil flows back into the oil trough.
›
Pull out the dipstick.
›
Wipe the dipstick with a clean cloth and insert it again to the stop.
›
Pull the dipstick out again and check the oil level.
›
Re-insert the dipstick.
AThe engine consumes a little oil. The oil consumption may be as much as 0.5
l/1000 km depending on your style of driving and the conditions under which
you operate your vehicle. Consumption may be slightly higher than this during
the first 5 000 km.
The oil level must be checked at regular intervals.
In case of low oil level, the instrument cluster display shows a warning light 
as well as the relevant notification » page 38. Check the oil level using the dip-
stick as soon as possible. Add oil accordingly.
CAUTION
■ The oil level must never be above the range A » Fig. 206 - risk of damage to
the motor as well as the exhaust system.■
If for some reason it is not possible to top up the engine oil under the current
circumstances, 
do not continue driving! Switch off the engine and seek as-
sistance from a specialist garage.
■
If the oil level is above level
A
, 
do not continue to drive! Switch off the
engine and seek assistance from a specialist garage.
Replenishing
Read and observe
and on page 197 first.
›
Unscrew the cap of the engine oil filler opening » Fig. 204 on page 196 .
›
Replenish the oil in portions of 0.5 litres in accordance with the correct speci-
fications » page 197 .
›
Check the oil level » page 198.
›
Screw the lid of the engine oil filler closed carefully.
›
Pull the dipstick out as far as the stop.
Coolant
Introduction
This chapter contains information on the following subjects:
Checking the coolant level
199
Replenishing
200
The coolant provides cooling for the motor.
It consists of water and coolant additive with additives that protect the cooling
system against corrosion and prevents furring. 
198General Maintenance

The coolant additive percentage in the coolant must be at least 40%.
The coolant additive may be increased to a maximum of 60%.
The correct mixing ratio of water and coolant additive is to be checked if nec-
essary by a specialist garage or is to be restored if necessary.
The description of the coolant is shown in the coolant expansion reservoir
» Fig. 207 on page 199 .WARNINGThe engine compartment of your car is a hazardous area. The following
warning instructions must be followed at all times when working in the en-
gine compartment » page 194.■
The coolant is harmful to health.
■
Avoid contact with the coolant.
■
Coolant vapours are harmful to health.
■
Never open the end cover of the coolant expansion reservoir while the
engine is still warm. The cooling system is pressurized!
■
When opening the end cover of the coolant expansion reservoir, cover it
with a cloth to protect your face, hands and arms from hot steam or hot
coolant.
■
If any coolant splashes into your eyes, immediately rinse out your eyes
with clear water and contact a doctor as soon as possible.
■
Always keep the coolant in the original container, safe from people who
are not completely independent, especially children - there is a danger of
poisoning!
■
If coolant is swallowed, consult a doctor immediately.
■
Never spill operating fluids over the hot engine - risk of fire.
CAUTION
■ If for some reason it is not possible to top up the coolant under the current
circumstances,  do not continue driving! Switch off the engine and seek as-
sistance from a specialist garage.■
If the expansion tank is empty, do not top up with coolant. The system could
aerate - risk of engine damage, 
do not continue driving! Switch off the en-
gine and seek assistance from a specialist garage.
■
The amount of coolant additive in the coolant must never be allowed to be
less than 40 %.
■
Over 60 % of coolant additive in the coolant reduces the antifreeze protec-
tion and coolant effectiveness.
■
A coolant additive that does not comply with the correct specification can
significantly reduce the corrosion protection of the cooling system.
■ Any faults resulting from corrosion may cause a loss of coolant and can con-
sequently result in major engine damage.■
Do not fill the coolant above the mark
A
» Fig. 207 on page 199 .
■
If an error occurs, leading to the engine overheating, the help of a professio-
nal garage is to be sought - there is a risk of serious engine damage occurring.
■
Additional headlights and other attached components in front of the air inlet
impair the cooling efficiency of the coolant.
■
Never cover the radiator - there is a risk of the engine overheating.
Note
On vehicles that are fitted with an auxiliary heater (auxiliary heating and venti-
lation), the coolant capacity is approx. 1 l larger.
Checking the coolant level
Fig. 207
Coolant expansion reservoir
Read and observe and on page 199 first.
The coolant expansion bottle is located in the engine compartment.
Coolant expansion reservoir » Fig. 207
Mark for the maximum permissible coolant level
Mark for the lowest permissible coolant level
The coolant level should be kept between the marks
A
and
B
.
The coolant can be checked and topped up, if the following conditions are sat-
isfied.
The vehicle is on a horizontal surface.
The engine is turned off.
The engine is not heated.
The bonnet is open. 
AB199Inspecting and replenishing

Checking the level›Check the coolant level in the coolant expansion tank » Fig. 207.
If the engine is warm, the test result may be inaccurate. The level can also be
above the mark A
» Fig. 207 .
In the event of an insufficient coolant level, a warning light 
is displayed in
the instrument cluster, as well as the relevant notification » page 37. We still
recommend inspecting the coolant level directly at the reservoir from time to
time.
Loss of coolant
A loss of coolant is first and foremost an indication of a leak in the cooling sys-
tem. Do not merely top up the coolant. Have the cooling system checked by a
specialist garage.
Replenishing
Read and observe
and on page 199 first.
The coolant expansion tank must always contain a small amount of coolant» page 199, in section Introduction .
›
Place a cloth over the cap of the coolant expansion reservoir and unscrew
the cap carefully .
›
Replenish the coolant.
›
Turn the cap until it clicks into place.
Do not use an alternative additive if the specified coolant is not available. In
this case, use just water and have the correct mixing ratio of water and cool-
ant additive restored by a specialist garage as soon as possible.
Only refill with new coolant.
Brake fluid
 Introduction
This chapter contains information on the following subjects:
Checking the brake fluid level
200
Specification
201
The brake fluid reservoir is located in the engine compartment » Fig. 208 on
page 200 .
WARNING■
The engine compartment of your car is a hazardous area. The following
warning instructions must be followed at all times when working in the en-
gine compartment » page 194.■
Do not use used brake fluid - the function of the brake system may be im-
paired – risk of accident!
CAUTION
■ Do not continue your journey if the fluid level has dropped below the “MIN”
marking » Fig. 208 on page 200 ,  do not continue driving - there is a risk of
an accident! Seek help from a specialist garage.■
Brake fluid damages the paintwork of the vehicle.
Note
■ The brake fluid is changed as part of a prescribed inspection services.■We recommend using brake fluids from the ŠKODA Original Accessories
range.
Checking the brake fluid level
Fig. 208
Brake fluid reservoir
Read and observe and on page 200 first.
The fluid can be checked if the following conditions are met.
The vehicle is on a horizontal surface.
The engine is turned off.
The bonnet is open.
Checking the level
›
Check the level of brake fluid in the reservoir » Fig. 208.
The level must be between the “MIN” and “MAX” markings. 
200General Maintenance