I have a 1984 300 TD that has 230,000 miles on it. Just recently i have noticed oil on the grill and on the front of the hood. It doesn't occur all the time, just sporadically. I assume that it is coming off the engine, on to the grill and migrating up onto the hood. It only happens on the driver side of the car. There is also an unusual amount of oil on the undercarriage. Car still runs fine, just don't know where exactly the oil could be coming from and what it could mean.