I have a 1992 w-350 club cab with 150,000 miles on it. Now that it is cool out all of the time, I have witnessed some strange things. A) Light blue/white smoke at first start that dissappears after 1 mile of driving. B) <this is weird> After letting the truck cool down, not cool off, for about 2 hours, I am getting ridiculous amounts of white smoke. Any thoughts would help, and this truck is stock right now.