startup smoke

Someone.anyone. please help me ): All the foreign mechanics in my area screw me over, telling me it's something different just to make some cash. Okay; My car has around 220k miles on it so keep that in mind I have no upgrades as far as anything goes besides my exhaust is straight piped...

2006 750i; Miles 68k : I just starting noticing white smoke on cold start-up. I've had to add a quart of oil (as per the iDrive screen instructions) and there is a sweet smell right when I start the car. The smoke is not constant, just on start-up. I've been very busy and haven't been able to...