fuel additives SKODA OCTAVIA 2005 1.G / (1U) Owner's Manual

Fuel
242
Fuel
Petrol
Grades of petrol
There are various grades of petrol. Please read the brochure “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 245, fig. 188 .
A distinction is made between unleaded and leaded petrol. All Škoda vehi-
cles with petrol engines are equipped with a catalytic converter and must
therefore be only driven with unleaded petrol. Unleaded petrol complies
with the standard EN 228 .
The individual grades of petrol 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 petrol 91 RON. This does, however, result in a slight loss
in performance.
•Engines which need unleaded premium plus petrol 98 RON can
also be run on unleaded regular petrol 95 RON. This does, however,
result in a slight loss in performance. You can in exceptional circum-
stances also use unleaded petrol of 91 RON in the event that no
unleaded premium plus petrol of 98 RON or premium plus petrol of 95
RON is available. Refuel as soon as possible with unleaded premium plus
of 98 RON or unleaded premium petrol of 95 RON.
If, in an emergency, the only fuel available 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, however, be no advantages
gained by this in terms of engine performance 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 245, “Refuelling”.
Caution
•Filling the tank even only once with leaded petrol will result in the cata-
lytic 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.
Diesel
Diesel fuel
Grades of diesel fuel
Your vehicle can be driven with the following grades of diesel fuel:
„Diesel fuel with a cetane number of at least CN 49. (The cetane
number CN is a measure of the ignition performance of the diesel fuel.)
Diesel fuel must comply with the DIN EN 590.
„Biofuel (RME rape oil methyl ester fuel) must comply with the DIN
EN 14 214 . Please refer to the following guidelines ⇒page 243.
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Fuel243
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
„Diesel fuel mixture according to standard CSN 65 6508 from
02/2003 contains diesel fuel according to standard DIN EN 590 and a
concentration of biofuel (rape oil methyl ester) according to standard
DINEN14214 in the following two concentrations:
„5% share of biofuel RME according to the standard DINEN14214
- Denomination SMN 5,
„30% share of biofuel RME according to the standard
DINEN14214 - Denomination SMN 30.
The same principles apply for the diesel fuel mixture as for the biofuel
⇒ page 243.
Fuel additives
You must not use fuel additives, so-called “flow improvers” (petrol and
similar products) in diesel fuel.
It is then necessary to have the fuel filter drained of water by a Škoda
dealer more often than stated in the Service schedule if the quality of the
diesel fuel used is poor.
You can find information on refuelling ⇒page 245, “Refuelling”.
Caution
•Use a fuel complying with the standard. Filling the tank even only once,
which does not comply with the standard, can result in damage to the fuel
system.
•Water which has collected in the fuel filter can result in engine
problems.
Biofuel*
The possibility to refuel with biofuel only applies to vehi-
cles, which have been adapted at the factory for its use.
Biofuel (RME rape oil methyl ester fuel) must comply with the DIN EN
14 214 ⇒ .
Biofuel (methyl ester from rape oil) is manufactured from vegetable oil by
means of a chemical process.
Biofuel does not contain sulphur. This means that no sulphur dioxide
(SO
2) is produced when it is burnt.
The exhaust gases contain less:
•carbon monoxide (CO),
•hydrocarbons (HC),
•particles (soot).
than when operating with conventional diesel fuel.
The Biofuel is more biodegradable.
When using biofuel pay attention to the following points:
•The Performance may be reduced slightly if you switch to driving with
biofuel.
•The fuel consumption may increase slightly if you switch to driving
with biofuel.
We recommend refuelling with diesel fuel at temperatures below -10°C.
Biofuel conforming to DIN EN 14 214 can be mixed in any desired ratio
with diesel fuel conforming to the standard DIN EN 590.
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Fuel
244
Caution
•Filling the tank even only once with biofuel, which does not comply with
the standard DIN EN 14 214 , can result in damage to the fuel system.
•The possibility to refuel with biofuel only applies to vehicles, which
have been adapted at the factory for its use. Filling the tank even only
once with biofuel, which does comply with the standard DIN EN 14 214,
can otherwise result in damage to the fuel system.
•Water which has collected in the fuel filter can result in engine prob-
lems.
•It is prohibited to use biofuel and diesel fuel mixture (RME) for diesel
vehicles which are fitted with diesel particle filter.
Note
•On the inside of the fuel filler flap you will find the information whether
your vehicle can be driven with biofuel.
•When using biofuel certain maintenance work must be carried out
earlier than when using diesel fuel according to DINEN590 - see Service
schedule.
Operation in winter
Winter-grade diesel fuel
A different grade of diesel fuel is available at filling stations in winter than
during the summer. Using “summer-grade diesel fuel” at temperatures
below 0°C can result in operational problems because the diesel becomes
viscous as a result of paraffin separation.
It is therefore the case that DIN EN 590 prescribes diesel fuel class for
certain periods of the year which can also be purchased at the corre- sponding time during the year. “Winter-grade diesel fuel” will still operate
properly even at a temperature of -20°C.
It is often the case in countries with different climatic conditions that diesel
fuels available have a different temperature characteristic. Škoda dealers
and filling stations in the country concerned will be able to provide you with
information regarding the diesel fuels available.
Prewarming fuel
The vehicle is fitted with a fuel filter prewarming system. This secures
operation of a vehicle using diesel fuel down to an environmental temper-
ature of -25°C.
Caution
It is not permitted to add the various fuel additives on the market, including
petrol, to diesel fuel in order to improve its flow properties.
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