Opel 2014 Insignia Owner's Manual page 221

Different dipsticks are used
depending on engine variant.
When the engine oil level has
dropped to the MIN mark, top up
engine oil.
We recommend the use of the same
grade of engine oil that was used at
last change.
Vehicle care
The engine oil level must not exceed
the MAX mark on the dipstick.
Caution
Overfilled engine oil must be
drained or suctioned out.
Capacities 3 286, Engine oil quality/
viscosity 3 266.
Fit the cap on straight and tighten it.
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