what to do when car starts smoking

if its light blue, you have a cracked head gasget,

blue smoke--engine burning oil black smoke--engine burning too much fuel thick white smoke--engine burning coolant

regardless of what color your smoke is - you potentially have a serious problem. You can be sure that it is cheaper to fix it now rather than wait until the damage becomes catastrophic. Guaranteed - if you wait to fix it - it will fail at the worst time. Such as in the rain, away from home, important event, etc.