Thread: What's the most efficient speed?
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      10-16-2010, 07:13 PM   #3
bobbyd1961
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Drives: 2009 M3 sedan LeMans Blue
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Originally Posted by tomvcarter View Post
Hi, has anyone worked out what the most fuel efficient speed to be in Cruise control is? When I'm in the car with the family I try to at least try to be green...
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