My wild-*** guess is that the cooler charge allows the ecu to use less fuel as a safety margin. At the end of the day, it's probably all statistical noise and the gains all come from the tune leaning things out.
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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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