Opel 2015 Cascada Owner's Manual page 245

Capacities
Engine oil
Engine
including Filter [l]
between MIN and MAX [l]
Fuel tank
Petrol/diesel, refill quantity [l]
AdBlue tank
AdBlue, refilling quantity [l]
B14NEL, A16XHT,
B14NET A16SHT
4.0 5.5
1.0 1.0
Technical data
B16SHT, B20DTH
B16SHL
5.5 5,25
1.0 1,0
46 (ecoFlex version)
56
243
A20DTH,
A20DTR
4.5
1.0
7.5