Thank you supra power.
Official oil consumption for your vehicle is 1 litre of oil every 1000km. Anything above this is unacceptable. Consumption is high for the first years of the vehicles life.
The o rings (oil seals) that are described as not sealing unless under pressure work perfectely in all driving conditions, if this was not the case then unmetered air would be drawn into the engine thus affecting the running. You can drive the car as you wish without having to pay attention to problems sitting in traffic etc.
The oil seals will weep oil after time as the breather system has a mist of oil which is recirculated into the boost pipe system to reduce emmisions.

Hope this helps, Enjoy the car!!!