Quote:
Originally Posted by cn90
...theorize that the "old" fluid becomes "more liquidy" after ___ miles. The new fluid is supposedly "tighter".
As the car is driven the computer gets used to old liquidy fluid.
So when one puts a tighter fluid in, the computer needs to be reset for the new tighter fluid.
All nice in theory. In reality, it is a worthless idea, IMHO...
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This theory I presume is also used in other areas where BMW has engineered/designed adaptive behaviors...where after critical work is performed...a reset is recommended for the way clutches or similar engineering designs have adjusted to wear over time. See example below:
For example, the hydraulic transmission pressure adaptations...BMW suggests a reset after work on the valve bodies, or transmission change, or software update. Obviosly, adaptive engineering should compensate for any changes...but a quick reset after specific type of work performed probably is recommended for a quicker outcome.
My opinion as to the importance of a reset procedure hinges on the wording...when I see "recommended" or "suggested" or "mandatory"...those or key "guide" words for me.