I recently purchased a 350SDL with records a mile long. I knew about the rod bending issues. It has 137K on it. I runs like a dream. I changed the oil when I brought it home. I am at 1000K with no oil consumption. It is however producing a little smoke at idle, and under heavy acceleration a lot of smoke. I read somewhere in the forums to warm the engine up to normal operating temps. Bring RPM up to 3500 for 5 seconds and let off. I did this and it produced black smoke when bring up the motor and stopped while I held it there and did not smoke when I let off. The older gentlemen I bought the car from drove it easy. Could it just need an "Italian tuneup", or could it be something else?