Why would I have white smoke coming from back of vehicle?

What is your question?

Had my oil changed, the next morning when I started the car a thick white smoke came out. I bought bars stop leak for the engine. I flushed the system, added the stop leak. No smoke.. Drove it & 24 hrs later it's smoking again?? No loosing any fluid.

What makes this problem better or worse?

Worse when I first start it and when I accelerate. But the smoking does eventually stop

How long has your 2005 Toyota Sequoia had this problem?

1 week