White smoke from exhust, plz help

[riven83]

I am having small issue regarding to white smoke.
I have V8 X6 2008. 148000 Km driving,,

The issue is when I stop the car for 5 to 10 minutes, white smoke comes out from the left exhust pipe more than the right, even if the weather is not cold, its obvious,, But while driving, there is no white smoke at all,, And while stopping, and I press the accelerator, More white smoke comes out then disappear, then after seconds, the smoke appear again,,,

I replaced all the gasket and many job done to the engine, and after driving the car for less than two weeks, I received service message to top up 1 liter of oil!? I dont think this is natural...

Anyone can help me to understand what is going on with the car,,

[riven83]

One more thing to add, while driving on speed of 140 km/hr, each 300 meter, the petrol is reduce by one kilo, Is that normal?

[Flyinfosheezy]