Blowby from Turbo or Comp Rings?

Before i try disconnecting the drain tube of my turbo on my bobcat skidsteer (turbo kubota engine), i wanted to describe symptoms.

Every cold start involves burning of oil in the exhaust for 20 seconds, then it burns off, includes symptoms of blowby.. Does this sound like turbo failure or compression rings? engine has 2400hrs

If there is more information needed, lmk. Is there a way I can measure blowby?