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<E28> MPG calculation



Recently my MPG calculation on my OBC has gone awry.  In the past it would
read 23-25 or so and be within the ballpark (+or- 2mpg).  Now it just climbs
and climbs and climbs.  New average seems to be around 35 mpg or so.  Does
anyone have any suggestions as to the culprit.  Any knowledge out there
concerning how the OBC derives MPG.

Thanks in advance
Jeff Wilcox
88 535i

"A smoking hole is a small price to pay for a shit hot maneuver"

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