Truck came into the shop wouldn't run bc the dpf filter was stopped off we replaced it notice oil dripping from turbo piping so we inspected that issue we drained 2 quarts oil from intercooler so we checked the oil and it was 5 inches over the full mark so we serviced the oil (wasn't concerned with it over full bc that's something our operators would do) then test drove it and ran perfect we released it for two day then it comes back over full on oil again and intercool is full also its not milky like antifreeze and it don't smell like fuel but now the truck smokes I would think it would have to be a injector putting fuel into the oil for it to be over full and if the truck is smoking does that mean the dpf filter is bad any help is appreciated