Thread: Gas Mileage with JB4 Insalled
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Old 07-11-2012, 05:18 PM
caoman911 caoman911 is offline
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Location: Harrison, NJ
  
Join Date: Jul 2012
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Mein Auto: 2008 535xi
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Gas Mileage with JB4 Insalled
Maybe it's me but...I think I'm getting better mileage as a result of installing the JB4. In addition the car behave so much more smooth. I'd like to know if this is a vlid perception or just perceptual hype.
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