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      10-19-2012, 08:39 AM   #4
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mrjoed2's Avatar

Drives: '14 650 M Sport Edition
Join Date: May 2012
Location: Florida

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Originally Posted by southern6er22 View Post
Mine is always off - I have a 2012...

If I had a 2013, I would always keep it off. A cool experiment would be to see what happened to the fuel economy if I drove a 2013 650xi with the system turned on to see what happened to my fuel economy. I currently get about 11 mpg (+/- 1 mpg), but I think the auto start/stop (A.S.S. ) is a BandAid on a bullet hole. I could be wrong, but I wouldn't tolerate the annyance for a few miles per gallon extra...
I actually don't think we are talking a few miles per gallon savings with start/stop. Likely a fraction of a MPG. But I did test drive a '13 650 with it and it's not really bad at all. And look at the bright side - got to be one hell of a heavy duty starter !!