Holden Calais 2011 Problems

I'm not aware that Holden has said there is a fault with the engine that causes the high oil consumption; the reaction from dealers is usually the one you got, i.e., to monitor it. Ask the dealer to monitor it themselves and if their results show high oil consumption it's much easier for you to request remedial action. I don't believe there is any difference with the VF.

It could well be a valve lifter that's draining while the car is standing and the engine not running. It might be a case of establishing which lifter is at fault and replacing it, but you need an experienced mechanic to listen to it to determine where it is coming from. If it only happens when the engine is started from cold it might be necessary to leave the car with the dealer overnight.