Big MPG Drop at Just Cobb Stage 1?
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This is a discussion on Big MPG Drop at Just Cobb Stage 1? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey guys, I have a 2013 WRX with a Cobb SF Intake and the 93 Octane Cobb Stage 1 + ...

  1. #1
    Registered User BeyondSchwifty's Avatar
    Join Date
    Dec 2016
    Somerville, MA

    Big MPG Drop at Just Cobb Stage 1?

    Hey guys,

    I have a 2013 WRX with a Cobb SF Intake and the 93 Octane Cobb Stage 1 + Intake HWG map. After installing the intake and flashing the new map, the average gas mileage for my daily commute has dropped from about 23mpg to 18mpg (tracked over a period of ~2 months on both sides of the install). For reference, I commute from Somerville, MA to Bedford, MA using route 2, 95, and route 3. So, it's a mix of interstate driving and a little city driving.

    This was a much bigger hit to my mpg than I had expected from just a stage 1 map. Does this seem reasonable? Or is it a sign that something could be wrong?

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  3. #2
    Registered User nsibanez's Avatar
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    Aug 2012
    Tucson, AZ
    I Support ClubWRX
    Probably just being heavy on the gas...the tune opens the car up more. I remember it being more responsive when I had my 2009. I doubt it's anything to worry about honestly. Check your logs to be sure though
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  4. #3
    Registered User
    Join Date
    Jan 2015
    Central NJ
    There's a high low and normal WG map. Why run HWG? Bedford is just 135' for sea level (have fam in Quincy), flash to the normal and see how that goes

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