There's no set answer. Get an oil analysis from Blackstone and they'll let you know what's safe to run. They want me to run my current oil to 4500 miles, and well see if there's more room left to push it on the next analysis.
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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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