Guys I need some help. Dad has a 08 6.7 6 speed. Dpf and egr delete, anddioblo power pb puck. He was goin up interstate ramp and trying to get up to traffic speed when all of a sudden white smoke put poured out and truck went into limp mode. Truck has 65000 miles. Check the oil and shows none on the stick and had liquid out of tail pipe. Black like oil. Anybody have any ideas ?