White smoke comes poring out of my car every time I start it. I have had the oil changed and flushed and it still smokes bad. The car was just tuned up and runs great it just wont stop smoking. The mechanic said he will flush it again today but I think something is loose or leaking. I have spent a lot of money and still same problem. please help!! I have 50000 miles on the car and it just strated doing this one day.