Opel Automobile Owner's Manual page 151

Use of engine oil of only ACEA A1/B1
or only A5/B5 quality is prohibited,
since it can cause long-term engine
damage under certain operating
conditions.
Additional engine oil additives
The use of additional engine oil
additives could cause damage and
invalidate the warranty.
Engine oil viscosity
Use only engine oil viscosity grades
SAE 5W-30 or 5W-40, 0W-30 or
0W-40.
The SAE viscosity grade defines the
ability of an oil to flow. When cold, oil
is more viscous than when hot.
Multigrade oil is indicated by two
figures. The first figure, followed by
a W, indicates the low temperature
viscosity and the second figure the
high temperature viscosity.
Select the appropriate viscosity grade
depending on the minimum ambient
temperature.
■ down to -25°C:
SAE 5W-30 or SAE 5W-40
■ below -25°C:
SAE 0W-30 or SAE 0W-40
Coolant and antifreeze
Use only silicate-free long life coolant
(LLC) antifreeze.
The system is factory filled with
coolant designed for excellent
corrosion protection and frost
protection down to approx. -28 °C.
This concentration should be
maintained all year round.
The use of additional coolant
additives that intend to give additional
corrosion protection or seal against
minor leaks can cause function
problems. Liability for consequences
resulting from the use of additional
coolant additives will be rejected.
Brake and clutch fluid
Use DOT4 brake fluid.
Service and maintenance
Over time, brake fluid absorbs
moisture which will reduce braking
effectiveness. The brake fluid should
therefore be replaced at the specified
interval.
Brake fluid should be stored in
a sealed container to avoid water
absorption.
Ensure brake fluid does not become
contaminated.
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