2008 SKODA OCTAVIA fuel consumption

Driving and the Environment203
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
The fuel consumption can naturally also be
influenced by factors which are beyond
the driver's control. It is, for example, normal for the fu el consumption to increase
in winter and under worsened conditions such as poor road conditions, towing a
trailer, etc.
The technical requirements for low fuel usage and economic efficiency of the
vehicle have already been built into the ve hicle at the works. Special attention has
been given to minimising ne gative effects on the environment. It is necessary to
take note of the guidelines given in this chapter in order to make best use of these
characteristics and to maintain their effectiveness.
The optimal engine speed should be obtain ed when accelerating, in order to avoid
a high fuel consumption an d resonance of the vehicle.
Looking ahead when driving
A vehicle's highest fuel consumption occurs it accelerates.
Avoid accelerating and brakin g unnecessarily. If you drive with forsight you will not
need to brake so often and will also then not have to accelerate so much. Let your
vehicle coast to a stop, for example, if this is possible, when you see that the next
set of traffic lights is at red.
Shifting gears and saving energy
Shifting up early saves on fuel.
Manual gearbox
– Drive no more than about one length of your vehicle in first gear.
– Always shift up into the next higher gear at approx. 2 000 to 2 500 revs.
Automatic gearbox
– Depress the accelerator pedal slowly. Do not depress it beyond the
kickdown position, however.
An effective way of achieving good fuel economy is to shift up early. You will
consume more fuel if you drive at unnecessa rily high revolutions in any given gear.
The ⇒fig. 201 shows the ratio of fuel consumption to the speed of your vehicle in
the relevant gears. Fuel consumption in 1st gear is the highest, while that in 5th or
the 6th gear is the lowest.
Only depress the accelerator pedal slowly if your vehicle is fitted with an automatic
gearbox in order to automatically select an economic driving programme. You will
achieve good fuel economy by shifting up early and shifting down late.
Note
Also use the information supplied by the multi-functional indicator* ⇒page 21.
Fig. 201 Fuel consumption
in litres/100 km. and speed in
km/h.
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Driving and the Environment
204
Avoiding full throttle
Driving more slowly means saving fuel.
Sensitive use of the accelera tor will not only significantly reduce fuel consumption
but also positively influence environmen tal pollution and wear of your vehicle.
You should avoid fully exploi ting the top speed of your vehicle wherever possible.
Fuel consumption, pollutant emissions and vehicle noises increase disproportion-
ally at high speeds.
The ⇒fig. 202 shows the ratio of fuel consumption to the speed of your vehicle.
You will cut your fuel consumption by half if you only make use three-quarters of
the possible top speed of your vehicle.
Reducing idling
Idling also costs fuel.
It is worthwhile switching off the engine in a traffic jam or when waiting at a level
crossing or at traffic lights with a length y red phase. Even after just 30 - 40 seconds
you will have saved more fuel than that is needed when you start the engine up
again.
If an engine is only idling it takes much longer for it to reach its normal operating
temperature. Wear-and-tear and pollutant em issions, though, are particularly high in the warming-up phase. This is why you
should drive off right after starting the
engine. Do avoid high engine revolutions at this time, however.
Regular servicing
A poorly tuned engine consumes an unnecessarily high amount of
fuel.
Having your vehicle serviced regularly at a specialist garge enables you to satisfy
one of the requirements for economical moto ring even before you set off on your
journey. Keeping your vehicle properly servic ed not only has a positive effect on the
safety of your vehicle and maintaining its value, but also saves on fuel.
A poorly tuned engine can result in a fuel consumption which is 10% higher than
normal.
The foreseen maintenance work should be undertaken exactly according to the
Service schedule by a specialist garage.
Also check the oil level after refueling. Oil consumption is dependent to a consid-
erable extent on the load and speed of the engine. Oil consumption could be as
high as 0.5 litres/1 000 km depending on your style of driving.
It is quite normal that a new engine ha s a higher oil consumption at first, and
reaches its lowest level only after a certain running in time. It is therefore not
possible to correctly assess the oil cons umption of a new vehicle until after you
have driven about 5 000 km.
For the sake of the environment
•You can achieve additional improvements in your fuel economy by using high-
lubricity oils.
•Check the ground below your car at regula r intervals to detect any leakages in
good time. Please have your vehicle inspected by a specialist garge if you find any
stains caused by oil or other fluids on the floor.
Fig. 202 Fuel consumption
in litres/100 km. and speed in
km/h.
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Driving and the Environment205
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Avoid driving short distances
Short distances result in an above-average high fuel consumption.
– Avoid driving a distance of no more than 4 km if the engine is cold.
The engine and catalytic converter mu st first have reached their optimal operating
temperature in order to effectively reduce fu el consumption and pollutant emis-
sions.
The cold engine vehicle consumes approx. 15 - 20 litres/100 km of fuel immediately
after starting. Fuel co nsumption drops to 10 litres/100 km after just 1 kilometre. The
engine reaches its operating temperat ure (outside temperature and engine
dependent) only after about 4 to 10 kilometres and the fuel consumption then
stabilizes. You should therefore avoid driving short distances whenever possible.
An important factor in this connection is also the ambient temperature. The
⇒ fig. 203 shows the different fuel consumptions for the same distance, on the one
hand at +20°C and on the other hand at -10°C. Your vehicle has a higher fuel
consumption in winter than in summer.
Checking tyre inflation pressures
Tyres which are correctly inflated save fuel.
Always ensure that your tyres are inflated to the correct pressure at all times. The
rolling resistance will be increased if the tyre filling pressure is too low. This will not only increase fuel consumption but also
tyre wear and the driving behaviour will
worsen.
Always check the inflation pressure of the tyres when cold.
Do not drive with winter tyres all year round for this costs about 10 % more fuel.
Winter tyres are also louder.
No unnecessary ballast
Transporting ballast costs fuel.
The fact that every kilogram of extra weight increases your fuel consumption
means that it is worth taking a look in the luggage compartment to avoid trans-
porting any unnecessary ballast.
It is particularly in town traffic, when one is accelerating quite often, that the vehicle
weight will have a significant effect upon the fuel consumption. A rule of thumb
here is that an increase in weight of 100 kilograms will cause an increase in fuel
consumption of about 1 litre/100 kilometres.
You may frequently also leave a roof rack fitted on just out of convenience,
although you no longer need it. The incr eased aerodynamic drag of your vehicle
causes it to use about 10% more fuel th an normal at a speed of 100 - 120 km/h,
even when you are not carr ying a load on the roof.
Saving electricity
Generating electricity costs fuel.
– Switch off electrical components as soon as you no longer need them.
When the engine is running, the alternator generates and supplies electrical power.
The greater the load on the alternator as a result of having a large number of elec-
trical components switched on, the more fuel will be consumed for operating the
alternator.
Fig. 203 Fuel consumption
in litres/100 km at different
temperatures
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Driving and the Environment
206
Keeping a log of your fuel consumption
If you really wish to ke ep a close check on your fuel consumption, it is best to enter
the figures in a logbook. This does not take much time but is a very worthwhile exer-
cise. It enables you to detect any change (positive and negative) at an early stage
and to take any appropriate action.
If you find that your fuel consumption is too high, you sh ould reflect on how, where
and in what conditions you have driven the vehicle since you last refuelled.
Environmental compatibility
Environmental protection has played a majo r role in the design, selection of mate-
rials and manufacture of your new Škoda. Particular emphasis has been paid to a
number of aspects, including:
Design measures
•Joints designed to be easily detached.
•Simplified disassembly due to the modular structure system.
•Improved purity of differ ent classes of materials.
•Identification of all plastic parts in accordance with VDA Recommendation 260.
•Reduced fuel consumption and exhaust emission CO2.
•Minimum fuel leakage during accidents.
•Reduced noise.
Choice of materials
•Extensive use of recyclable material.
•Air conditioning filled with CFC-free refrigerant.
•No cadmium.
•No asbestos.
•Reduction in the “vaporisation” of plastics.
Manufacture
•Solvent-free cavity protection.
•Solvent-free protection of the vehicle for transportation from the production
plant to the customer.
•The use of solvent-free adhesives.
•No CFCs used in the production process.
•Without use of mercury.
•Use of water-soluble paints.
Motoring abroad
General
Other circumstances may exist abroad.
It is also possible, in ce rtain countries, that the Škod a Service Partner network is
limited or has not been established yet. This is the reason why obtaining certain
spare parts may be somewhat complicated and specialist garage personnel may
only be able to ma ke li mite d re pa irs. Škoda Auto a.s. i n the Czech Republic and rele -
vant importers are happy to provide info rmation about technical aspects of the
vehicle, required maintenance work and possibilities for getting repairs done.
Unleaded petrol
A vehicle fitted with a petrol engine must always be refuelled with unleaded petrol
⇒ page 202. The automobile associations can provide you with information
regarding the locations of filling stations which offer unleaded petrol.
Headlight
The low beam of your headlights is set asym metrically. It illuminates the side of the
road on which you are driving to a greater extent. If you drive abroad on the other
side of the road, you wi ll dazzle oncoming traffic.
In order to prevent the dazzling of oncoming traffic, it is necessary that an adjust-
ment of the headlights is carried out by your Škoda Service Partner.
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Fuel219
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Fuel
Petrol
Grades of petrol
There are various grades of petrol. Please read ⇒ page 269, “Technical Data” in
order to know which grade of petrol your vehicle requires. You will also find the
same information affixed to the inside of the fuel filler flap of your vehicle
⇒ page 222, fig. 207 .
A distinction is made between unleaded an d leaded petrol. All Škoda vehicles with
petrol engines are equipped with a catalyti c converter and must therefore be only
driven with unleaded petrol . Unleaded petrol complies with the standard
DINEN228 .
The individual grades of petr ol are distinguished by their octane number (RON).
Please adopt the following procedure if the grade of petrol which you normally use
is not be available in exceptional circumstances.
Engines which need unleaded premium petrol 95 RON can also be run on
unleaded regular petrol 91 RON. This does, however, result in a slight loss in
performance.
If, in an emergency, the only fuel availa ble is one which has a lower octane number
than that required by the engine then only drive at medium engine speeds and
lower engine loadings.
You can make unlimited use of fuel which has a higher octane number than that
required by the engine. There will, howeve r, be no advantages gained by this in
terms of engine performa nce and fuel consumption!
The handling, performance and life of your engine are determined to a significant
extent by the quality of the fuel. Do not use any petrol additives. Use a fuel
complying with the standard.
You can find further information on refuelling ⇒page 222, “Refuelling”.
Caution
•Filling the tank even only once with leaded petrol will result in the catalytic
converter being destroyed.
•Operating the engine with petrol of a low octane number can result in engine
damage at high revolutions or severe engine loading.
Biofuel Ethanol E85*
Ethanol E85*
Only valid for vehicles with 1.6/75 kW MultiFuel engine.
Biofuel Ethanol E85 consists of 85% bi oethanol and 15% unleaded petrol
complying with the standard (DIN) EN 228.
Biofuel Ethanol E85 in accordance with th e standard (DIN) EN 228 can be mixed in
any desired ratio with unleaded petrol, see Owner's Manual.
Drive the vehicle for at least 5 minutes without interruption, if biofuel Ethanol E85
has been refuelled, so that the engine co ntrol unit can determine the share of the
biofuel in the fuel. During this period do not drive at top speed of your vehicle or
high engine speeds and not at full throttle . During this process decrease the idling
speed.
WARNING
Pay attention to any legal requirements if you do carry a spare canister in the
vehicle. We do not recommend carrying any fuel canisters in your vehicle for
safety reasons. The canister can be da maged in the event of an accident and
fuel may leak out.
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Fuel
220
Caution
•Even inadvertently filling the fuel tank with another biofuel such as Ethanol°E85
can result in damage to the fuel system.
•If you park the car for a lengthy period, fill with petrol complying with (DIN)
EN°228, because Ethanol E85 can contain lo w quantities of impurities, which can
lead to corrosion.
For the sake of the environment
If you use Ethanol E85, the CO2 emission of your vehicl e is lowered up to 5%.
Note
•When operating with Ethanol E85, the fuel consumption increases by approx
33%, as a lower quantity of energy is contained in the bioethanol than in unleaded
petrol.
•Biofuel Ethanol E85 contains only a low quantity of additives in contrast to
unleaded petrol. Therefore we recommend to fill up the tank with unleaded petrol
complying with EN 228 every 15 000 km (e.g. before the oil change) and run it
empty, so that the engine remains clean. Make sure not to use the whole content of
the tank ⇒page 222, “Refuelling”.
•The interval of 15 000 km applies for the oil change.
Operation in winter
If you use biofuel Ethanol E85 at very low temperatures, it is necessary to preheat
the engine before an engine start.
The power socket for the engine preheating is located in the front bumper next to
the fog light ⇒fig. 205 .
If an engine preheating is not possible at outside temperatures lower than -10 °C,
the share of unleaded petrol complying with EN 228 must be as high as possible.
Thus the cold start property of the engine is clearly improved.
If there is biofuel Etha nol E85 in the tank and the engine is not preheated, it can lead
at temperatures below -15°C to very poor or no starting of the engine.
For the sake of the environment
The use of engine preheating at temperatures below -10°C has a positive effect on
the fuel consumption and thus on the environment.
The outside temperatureDuration of engine preheating
lower than -10 °Cwe recommend up to 1 hour
lower than -15 °Cat least 1 hour
lower than -25 °Cat least 2 hour
Fig. 205 MultiFuel - power
socket
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Inspecting and replenishing227
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Engine oil
Check engine oil level
The dipstick indicates the level of oil in the engine.
Checking the oil level
– Park the vehicle on a horizontal surface.
– Switch the engine off.
– Open the bonnet ⇒ in “Working in the engine compartment” on
page 225.
– Wait a few minutes and pull out the oil dipstick.
– Wipe off the dipstick with a clea n cloth and insert it again fully.
– Then withdraw the dipstick ag ain and read off the oil level.
Oil level within range
– You must not top up the oil. Oil level within range
–You
may top up the oil. It is possible that the oil level may then be
within range after doing this.
Oil level within range
–You must top up the oil ⇒page 228. It is sufficient, once this is done,
to keep the oil level within range .
It is normal for the engine to consume oi l. The oil consumption may be as much as
0.5 ltr./1 000 km depending on your style of driving and the conditions under which
you operate your vehicle. The oil consumpt ion may be slightly higher than this
during the first 5 000 kilometres.
One should therefore check the oil level at regular intervals, preferably every time
after the fuel tank is filled or after driving for long stretches.
We recommend maintaining the oil level within the range - but not above this,
if the engine has been operating at hi gh loads, for example during a lengthy
motorway trip during the summer months, towing a trailer or negotiating a high
mountain pass.
The warning light in the instrument cluster* will indicate ⇒page 36, “Engine oil
pressure ” whether the oil level is too low. In this case, check the oil level as soon
as possible. Top up with an appropriate quantity of oil.
Caution
•The oil level must on no account ex tend beyond the range . Danger of
damaging the catalytic converter.
•Do not continue your journey if for some reason it is not possible under the
conditions prev ailing to top up with oil. Switch of the engine and contact and
obtain professional assistance from a specialist garage.
Note
Engine oil specifications ⇒page 269, “Technical Data”.
Fig. 212 Dipstick
AA
AB
AA
AC
AC
AA
AA
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Wheels and Tyres
238
setting off on a long trip. Please do not forget the spare wheel when checking the
tyres.
The tyre inflation pressures for summer tyres are indicated on the inside of the fuel
filler flap ⇒page 237, fig. 218. The inflation pressures for winter tyres are 20 kPa
(0.2 bar) higher than those for summer tyres ⇒page 241.
The tyre pressure should be at the highest pressure specified for your vehicle at all
times.
The tyre inflation pressure of the emergency spare wheel R 18 is 420 kPa (4.2 bar).
Always check the inflation pressure of ty res when cold. Do not reduce the higher
pressure of warm tyres. Adapt the inflation pressure of the tyres accordingly if your
vehicle is carrying a significantly higher payload.
Driving style
Fast cornering, sharp acceleration and braking (squealing tyres) increase wear-and-
tear on your tyres.
Balancing wheels
The wheels of a new vehicle are balanced. There are a wide range of influences
when driving which may result in an imbalance and which makes themselves felt
through vibration in the steering.
You should have the wheels rebalanced since any imbalance increases wear-and-
tear on the steering, the suspension and tyres. A wheel must also be rebalanced
when a new tyre is fitted and each time a tyre is repaired.
Wheel alignment errors
Incorrect wheel alignment at the front and re ar will not only increase wear-and-tear
on the tyres but will also has an adverse effect on vehicle safety. Contact your
specialist garage if you notice any unusual tyre wear.
WARNING
•If the inflation pressure is too low, the tyre must perform a greater flexing
work. At higher speeds the tyre will warm up as a result of this. This can
result in tread separation and even a tyre blowout.
•Immediately replace the damaged rims or tyres.
•Tyres which are 6 years old or more should only be fitted in exceptional
cases and when adopting an approp riately cautious style of driving.
For the sake of the environment
Tyres which are insufficiently inflated increase your fuel consumption.
Wear indicators
The base of the tread of the original tyres has wear indicators 1.6 mm high, installed
at right angles to the direction of travel. These wear indicators are located at 6 - 8
points depending on the make and are evenly spaced around the circumference of
the tyre ⇒fig. 219 . Markings on the walls of the tyres through the letters “TWI”,
triangular symbols or other symbols identi fy the position of the wear indicators.
A remaining tread of just 1.6 mm, measured in the grooves of the tread next to the
wear indicators, means that your tyres have reached their legally permissible
minimum tread depth.
WARNING (continued)
Fig. 219 Tyre tread with wear
indicators
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