2013 135 IS gas mileage dropping - Bimmerfest - BMW Forums



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Old 10-24-2017, 10:27 AM
zcwagon zcwagon is offline
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Location: Fountain Hills, AZ
 
Join Date: Jul 2017
Posts: 10
Mein Auto: 2013 135is
2013 135 IS gas mileage dropping

Anyone know why my mileage would be dropping now in the low 20 high teens. This is similar driving habits it has drop 3 to 5 MPG.

70,000 miles, cleaned air filters no change

Work that has been done
power steering pump
water pump
thermostate
aux belt and tensioner
reg. Oil changes
battery

any ideas would be appreciated
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  #2  
Old 10-24-2017, 05:49 PM
allikanbe allikanbe is online now
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Location: yorktown, va
 
Join Date: May 2010
Posts: 303
Mein Auto: 2013 335is vert
are you basing it on the dashboard data or your own math? I never believe the dashboard data. Any fuel leak smell? I have the same car. I have never checked the mpg.
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Old 11-01-2017, 08:10 AM
tpreston033 tpreston033 is offline
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Location: Southern Utah
 
Join Date: Nov 2017
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Mein Auto: BMW'so
My wife has the 2013 135i E82 and had similar poor fuel economy. I had the car vacuum system smoked and found a major vacuum leak. $18 seal later and all is well. Just a thought. Good luck.
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