hi i have a gt 35 turbo on my 7 and soon as i start my car it smokes a lil white smoke and if you watch the oil pres. in the car it will have good press. then just fall on its face then go back to normal. or it will slowly drop and it i down **** real fast it will go back and stay for a few min then do it again.

 

If it is doing this while it's smoking out the exhaust, you could have a bad turbo leaking oil and coolant. Test again with a known to be good turbo. Worst case scenario your engine is bad...