Mazda CX-7 This sporty turbocharged 4 cylinder SUV combines the spirit of a performance car with the versatility of an SUV.

2011 CX-7 Sport MPG issues

  #1  
Old 10-07-2018, 05:54 PM
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Default 2011 CX-7 Sport MPG issues

Over the past few months my cx-7 MPG has been slipping. Most of my miles are via highway with cruise on and my mpg is constantly between 18-22, whereas it used to be 25-28. I've changed the spark plugs and oil. Any advice?
 
  #2  
Old 10-08-2018, 05:44 AM
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is it the turbo 2.3 or non turbo 2.5 engine? FWD or AWD?

When did it last go to Mazda for software updates? Has it been scanned for codes, & live data inspected?
 
  #3  
Old 10-08-2018, 09:39 AM
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Replace the upstream O2 sensor.
 
  #4  
Old 01-27-2019, 10:46 AM
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Default Same mpg concerns

Iím wondering how you are doing with this issue. I am averaging 20 MPG with my 2011 with 2.5 liter and FWD. I about split my time on highway and city streets. Seems to perform well. It is winter and Iím running Blizzaks but it wasnít much better in this fall with OEM tires when we bought the car used. About 90,000 miles. Any suggestions for what tests to run and why?
 
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