Quote:
Originally Posted by nuclearbeef
Looking at TDIwise's logging of EGR usage, it appears that EGR is highest at partial "throttle", light loads. EGR is off when coasting, idling, and higher engine loads.
Seems like highway miles would cause the most EGR. Stoplight to stoplight driving would use the least EGR. (especially when driving "spiritedly")
Anecdotally, people driving lots of highway miles seem to delay CBU. Could it be that the larger component causing CBU is coming from the PCV oil mist? Maybe more oil is generated in the intake tract with stop and go driving?
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Highway driving changes the miles/engine hours ratio, so maybe CBU is better represented by logging engine hours.
PL