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Old 12-30-2011, 08:06 AM
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chuck92116 chuck92116 is offline
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Location: San Diego
 
Join Date: Nov 2011
Posts: 867
Mein Auto: 2011 535i
On the F10, it makes a whopping 1 MPG difference. Why bother?

Any fuel savings will be lost to premature component failure.

This reminds me of the V8-6-4 and converted gas to diesel engines that GM came out with in the 70's. The drivetrain was not designed for these kinds of features and they failed prematurely.

I am all for better fuel economy as long as it makes sense. But with modern BMWs constantly having battery drain issues, this makes no sense to me.
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2013 VW Golf TDI
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