Chevrolet Captiva Owner's Manual page 279

Engine Oil
Engine Oil is identified by its Quality
and its Viscosity Grade. "Quality" and "
"Specification" are equivalent terms in
this respect. Engine Oil Quality is more
important than Viscosity when selecting
which Engine Oil to use. The Oil Quality
ensures e.g. engine cleanliness, wear
protection and oil aging control, whereas
Viscosity Grade gives information on
the oil's thickness over a temperature
range.
Engine Oil Quality for Service
Only use 5W-30 ACEA A3/B4 engine
oil.
Topping up Engine Oil
The viscosity should be of the correct
rating. Only use 5W-30 ACEA A3/B4
engine oil.
Use of Engine Oil with only ACEA
A1/B1 or only ACEA A5/B5 Quality is
prohibited, as it can cause long term
engine damage under certain operating
conditions.
Engine Oil Additives
The use of supplemental Engine Oil
Additives could cause damage and
invalidate the warranty.
Engine Oil Viscosity Grades
The SAE Viscosity Grade gives inform-
ation of the thickness of the Oil.
Multigrade Oil is indicated by two
figures:
The first figure, followed by a W,
indicates the low temperature Viscosity
and the second figure indicates the high
temperature Viscosity.
Service and Maintenance 10-7
SAE 5W-30 is the best Viscosity Grade
for your vehicle. Do not use other
Viscosity Grade Oils such as SAE 10W-
30, 10W-40 or 20W-50.
Cold Temperature Operation:
If operating your vehicle in an area of
extreme cold, where the temperature
falls below -25°C, a Viscosity Grade
SAE 0W-xx should be used. An Oil of
this Viscosity Grade will provide easier
cold starting for the engine at extremely
low temperatures.