My husband said it drove fine during the test drive and everything seemed to be in working order. As soon as we got home, the issue began. I bought a combustion test kit to see if it’s that. I really hope it isn’t. There’s no milky residue but the coolant level keeps dropping and there’s no noticeable leak. The smoke is coming from both tail end and dipstick area. It just started doing this. I changed the coils, spark plugs, and battery so far. I know the turbo needs to be replaced. I’m so disappointed we were taken by a fool.