Engine Oil Viscosity - Case 570T Operator's Manual

7 - MAINTENANCE

Engine oil viscosity

As a general rule, multi-grade oils must be used. In closed
rooms heated to temperatures > 5 °C (41 °F), it is also
possible to use single-grade oils. As the viscosity of lubri-
cating oils varies according to the temperature, the tem-
perature of the place where the engine will be used is de-
cisive for choosing the oil viscosity grade ( SAE grade).
According to the diagram reported here to the side, it is
possible to choose the necessary oil viscosity for each
temperature in order to guarantee an optimum operation
of the engine. If a certain oil type is used to temperatures
lower than those indicated in the diagram, it could nega-
tively affect the starting capacity of the engine, but without
damaging the engine itself.
The use of a certain type of oil at temperatures above
those indicated in the diagram must be limited as much as
possible, in order to minimize the possible wear damage
caused to the engine.
Synthetic oils provide a better performance because of
their better stability as regards temperature and oxidation.
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