[ossiblue]

Here are the clues:

The smoke doesn't show until about 30-45 seconds after startup and seems to continue until the car is warm.

I've only been doing around town driving (less than 20-30 miles, 2 or 3 days/week).

There is a lot of moisture here in the PNW.

the car is only really at a warm temperature (temp gauge at 8 o'clock) for 10-20 minutes each drive.

Given your mechanic (JW) and the other factors you describe, added to the clues, above, I'm betting you're seeing moisture from the crankcase/oil tank. It's very typical for water vapor to be seen early on in a cold start, and last a bit longer in situations like yours. The boiling off of water in the oil will take a bit of time at high temps. Your driving pattern doesn't seem to be enough to fully get rid of the moisture which is collecting in the oil tank. Take the car out for a good, long drive at freeway speed and you'll likely see the "smoke" appear early, and disappear, completely, shortly thereafter.