If its always been 10.1:1, you either have something wrong with your car or your data logging. A couple of dyno runs are ~$50-75. That's a lot cheaper than popping a motor because what you thought was 12.7 was 14.7 and you sucked up a bunch of hot air or bad gas.
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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
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