Opel Adam 1.0 2019 Owner's Manual page 207

Engine oil viscosity grades
Ambient temperature
down to -25 °C
below -25 °C
down to -20 °C
Permitted, but usage of oils with dexos quality is recommended.
1)
All countries with international service interval 3 198
Petrol engines
SAE 0W-30 or SAE 0W-40
SAE 5W-30 or SAE 5W-40
SAE 0W-30 or SAE 0W-40
SAE 10W-30 1) or SAE 10W-40 1)
Technical data 205