Volvo VHD Betreibershandbuch Seite 69

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Oil System 65
Oil Viscosity
The viscosity grade defines the thickness of
the oil. The oil must be thin enough at low
temperatures for easy cold starts and thick
enough to protect at high temperatures. An
oil is not fully defined until both the API
quality classification a
nd the viscosity grade
are specified.
Choose the viscosity grade for the typical
ambient temperature for the application.
Multigrade oils have a broad range that suit
operation in changing temperature. Only
choose a monograde oil if the temperature is
holding steady over a long period of time
Volvo Trucks North America, Inc.
recommends the viscosities shown in
the viscosity/temperature table for Volvo
engines. For Cummins engines see your
introductory package. Choosing an oil with
a lower viscosity can help improve the fuel
economy. However, if this is done, make
sure the upper temperature limit is not
exceeded. Also, with low viscosity oil, oil
consumption can increase.
CAUTION
Extra oil additives must not under any
circumstances be added to any engine oil
used. Additives such as break-in oils, top
oils, graphitizers and friction reducing
liquids are not necessary and may even
harm the engine.
W1000144
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