Puff of blue gray smoke at cold startup

as in the title and this is the only time it will do it, (after overnite).
It is smoke not condensation about 6 ft, tall and 2 ft. across. 6 cyl. 2012
1600 miles. I am afraid of valve seat problems. Dealer wants me to drop it
off overnight to see if they can recreate the problem and it is 30 miles with me having to arrange a ride , twice. They or Toyota will not take my
word for it which puts us on different sides to start with.

 

sounds like it's burning oil but i'm not sure why it'd only be at cold start

EDIT: unless it's just the very begging of the problem.. in which case, get it checked if you don't know how to yourself

 

Frankbud-- what did you find out about your truck and the smoking? Mine is doing the same thing on cold starts. I only have 400 miles on my truck

 

I would have the dealer check it as a precaution but honestly I think its just condensation just blowing out of the exhaust, used to happen on my WRX and my silverado. No issues with either of them and the WRX was modded as hell.

 

http://www.tacomaworld.com/forum/2nd-gen-tacomas/293218-blue-smoke.html