Opel ASTRA Owner's Manual page 289

Engine oil quality
ACEA A3/B3
ACEA A3/B4
ACEA C3
API SM
API SN resource
conserving
Engine oil viscosity grades
Ambient temperature
down to -25 °C
below -25 °C
down to -20 °C
Permitted, but usage of SAE 5W-30 or SAE 5W-40 with dexos quality is recommended.
1)
All countries outside Europe
except Israel
Petrol engines
(including CNG, LPG, E85)
✔
✔
✔
✔
✔
All countries outside Europe (except Israel),
including Belarus, Moldova, Russia, Serbia, Turkey
Petrol and diesel engines
SAE 5W-30 or SAE 5W-40
SAE 0W-30 or SAE 0W-40
SAE 10W-30 1) or SAE 10W-40
Only Belarus, Moldova, Russia, Serbia, Turkey
Diesel engines
(including CNG, LPG, E85)
–
✔
✔
–
–
1)
Technical data
Petrol engines
✔
✔
✔
✔
✔
287
Diesel engines
–
✔
✔
–
–