Volvo 2007 S80 Owner's Manual page 158

IMPORTANT
Certain special additives remove the water
separation in the fuel filter.
Petrol
Petrol must meet the EN 228 standard. Most
engines can be run with octane ratings of 95
and 98 RON. 91 RON should only be used in
exceptional cases.
• 95 RON can be used for normal driving.
• 98 RON is recommended for optimum
performance and minimum fuel consump-
tion.
When driving in temperatures above +38 ºC,
fuel with the highest possible octane rating is
recommended for optimum performance and
fuel economy.
IMPORTANT
Always refuel with unleaded petrol so as not
to damage the catalytic converter. In order
that Volvo's warranty shall remain valid,
never mix alcohol with petrol, as the fuel
system could be damaged. Do not use ad-
ditives not recommended by Volvo.
Catalytic converter
The purpose of the catalytic converter is to
purify exhaust gases. It is located close to
the engine so that it quickly reaches operat-
ing temperature.
The catalytic converter consists of a monolith
(ceramic or metal) with channels. The chan-
05 During your journey
nel walls are lined with a thin layer of plati-
num, rhodium and palladium. These metals
act as catalysts, i.e. they participate in and
accelerate a chemical reaction without being
used up themselves.
TM
Lambda-sond oxygen sensor
The Lambda-sond is part of a control system
intended to reduce emissions and improve
fuel economy.
An oxygen sensor monitors the oxygen con-
tent of the exhaust gases leaving the engine.
This value is fed into an electronic system
that continuously controls the injectors. The
ratio of fuel to air directed to the engine is
continuously adjusted. These adjustments
create optimal conditions for efficient com-
bustion, and together with the three-way cat-
alytic converter reduce harmful emissions
(hydrocarbons, carbon monoxide and nitrous
oxides).
Fuel
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