Volvo S90 2019 Owner's Manual page 556

MAINTENANCE AND SERVICE
Checking and filling engine oil (p. 555)
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Ignition modes (p. 381)
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554
Engine oil
For the recommended service intervals and
warranties to be applied, an approved engine
oil must be used.
Volvo recommends:
If the engine oil is not checked regularly and
the level becomes low, this could cause seri-
ous engine damage.
CAUTION
To satisfy the requirements for the engine's
service intervals, all engines are factory-
filled with a specially adapted synthetic
engine oil. Great care has been put into the
choice of oil, with consideration given to
service life, startability, fuel consumption
and environmental impact.
For the recommended service intervals to
apply, an approved engine oil must be
used. Only use the prescribed oil grade to
top off or change the oil. Otherwise, there
is a risk of the vehicle's service life, starta-
bility, fuel consumption and environmental
impact being affected.
Failure to use engine oil of the prescribed
grade and viscosity could cause damage to
engine-related components. Volvo Car Cor-
poration disclaims warranty liability for
such type of damage.
Volvo recommends entrusting oil changes
to an authorized Volvo workshop.
Volvo uses different systems to warn if the oil
level is too low/high or the oil pressure is low.
On engine variants with an oil pressure sensor,