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Thread: 2011 JK MPG Creeping Down

  1. #11
    Been Around the Block Steve Williams's Avatar
    Join Date
    Jul 2017
    Tucson, AZ
    Quote Originally Posted by MSJKU11 View Post
    I also have a 2011 and I average 13.9-14.2. I added new plugs but never cleaned the injectors aside from using B12. I didn't notice any change in MPG. I'm sitting at 90k miles. I used to get around 16 also but I've also added a lot of weight. Just sharing my experience, hope it helps.

    Sent from my SAMSUNG-SM-G930A using WAYALIFE mobile app
    Thanks, it helps to know I'm not completely out of bed.

  2. #12
    Knows a Thing or Two madstiles's Avatar
    Join Date
    Apr 2016
    Panama city , Florida
    Check for cracked manifolds. My mileage went down to 12 no codes or check engine light. Repaired manifolds now runs better more power and mileage is 14-16.

    Sent from my SAMSUNG-SM-G935A using WAYALIFE mobile app

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