2G Losing oil but not a lot of smoke

[Mauispyder]

1999 original long block gst. Not burning any oil. 130,000 miles.
So a window broke and I didn't start or drive the car for about 10 days. When I went to start it it ran fine but when I ran it through the rpms up to 3k, I noticed exhaust smoke. I shut it down and checked the oil level. It was a quart low so I added a quart, and drive it for a few miles with no exhaust smoke noted. Rechecked the oil and it was fine, same level. So over the next week I've started it everyday and let it idle for 5 min. I notice a really small amount of white smoke from the exhaust, like just a barely visible thread. I went to check the oil level again and it's down 1/2 to 3/4 quart!
No puddles or noticeable leaks under the car or on the ground. Anyone had a similar problem or know if I can lose that much oil idling without much smoke?

 

[Dsmkauai]

Check the feed and return lines for turbo and oil cooler. Those like to go bad. Also check the oil gauge sensor could be leaking out the sensor. Maybe pull off a ic pipe and make sure it's not full of oil. I would think if it's loosing that much oil thru the exhaust you would see it.

 

[luv2rallye]

White smoke is coolant. Seals in turbo might be going (both oil and coolant). Or you may have a small head gasket leak when warm (warm compression test would tell).