Quote:
Originally Posted by bustedbenz
The rest of the time it just has the little bit of smoke that a diesel always has. The harder the engine runs, the more it smokes.
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You failed to note the possibility of worn valve guides in conjunction with the seals. The guides would leak oil continuously, unrelated to load.
Therefore, if the oil consumption is much greater under high airflow (not necessarily high load), the culprit is the turbo seals.
You can verify this by revving it up to 3000 rpm in the driveway. If it smokes badly, similar to the situation on the highway (actually should be worse because the vehicle is stationary), you found your issue.