Opel Automobile Owner's Manual page 187

Engine oil viscosity
Use only engine oil viscosities
SAE 0W-30, 0W-40, 5W-30 or
5W-40.
The SAE viscosity grade gives
information of the thickness of the oil.
Multigrade oil is indicated by two
figures. The first figure, followed by
a W, indicates low temperature
viscosity and the second figure the
high temperature viscosity.
Select the appropriate viscosity grade
depending on the minimum ambient
temperature. All of the recommended
viscosity grades are suitable for high
ambient temperatures.
■ 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
Only use high-performance DOT4
brake fluid approved for the vehicle.
Consult your workshop.
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.
Service and maintenance 187