Just drove from salt lake to Los Angeles overnight in my 1988 300TE with 212K. On the way the car was performing beautifully however when i was using the cruise control i noticed significant amounts of white smoke coming out of the exhaust, especially when I disengaged it. Upon stopping I found oil on the rear lift gate. Oil pressure never dropped off 3 at 75-80 mph and engine temp was constant in mid 80s. I did burn about 1/2 a quart. I just had my head gasket and timing chain replaced no more than 500 miles ago. Any suggestions before I head back to salt lake on monday would be appreciated. I would love to be able to use the cruise again.