Blue smoke when starting after a run.

[RGuzz]

Blue smoke for a few seconds after a run when starting, clearing
quickly, but impressive. Doesn't happen when cold, as far as I can tell.
Never noticed before. Turbo with 60k miles? No oil consumption overall
at 5k changes, unless it's all just happening. Rebuilt engine with 60k
miles. Currently has Mobil One, 10w-30 oil in it,  which is fresh. This
seems like a new development. Enough smoking to make you gasp, takes 30
seconds to clear.
Suggestions?
Thanks,
Rich