Not sure about full E85, but E30 blend works best on B58. IMO same for S58. I wouldn’t risk full E85 either. One more time - very happy with MP tune for both platforms. MHD is also great
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph.
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