Opel Automobile Owner's Manual page 129

GM = General Motors Europe
LL = Longlife
A or B = Engine oil quality
specification
025 = Validity index
Engine oil that meets classifications
GM-LL-A-025 and GM-LL-B-025 is
suitable for both petrol and diesel
engines.
Topping up engine oil
Engine oils of different manufacturers
and brands can be mixed as long as
they comply with the required engine
oil (quality and viscosity).
If engine oil of the required quality is
not available, a maximum of 1 litre of
ACEA A3/B4 or A3/B3 grade may be
used (only once between each oil
change). The viscosity should be of
the correct rating.
Use of ACEA A1/B1 and A5/B5
engine oil is expressly forbidden,
since they can cause long-term
engine damage under certain
operating conditions.
Engine oil additives
The use of engine oil additives could
cause damage and invalidate the
warranty.
Engine oil viscosity
Use only engine oil viscosities SAE
0W-30, 0W-40, 5W-30 or 5W-40.
The SAE viscosity rating 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 low temperature
viscosity and the second figure the
high temperature viscosity.
Coolant and antifreeze
Use antifreeze of recommended
specification.
The system is factory filled with
coolant designed for frost protection
down to approx. -28 °C. This
concentration should be maintained
all year round.
Coolant additives intended to give
additional corrosion protection or seal
against minor leaks can cause
Service and maintenance
function problems. Liability for
consequences resulting from the use
of coolant additives will be rejected.
Brake and clutch fluid
Only use DOT4 brake fluid.
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.
Transmission fluid
Use fluid meeting specification
Grade: API GL-4
Viscosity: 75W-85 or 75W-90.
Automatic transmission fluid
Use fluid meeting specification
ATF3309.
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