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You can run e30 fine. Tuned you can run e50 no problem (that's what I'm running now). Dinan actually has a tune they are developing on full e85. Apparently the hp fuel pump on this engine is better then the previous version and more capable of supporting e85 and higher hp levels. According to my tuner the ecu can detect the ethanol level of the fuel and adjust accordingly.
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2020 M340i Xdrive Portimao
AA catless downpipe (offroad only of course)
BMS intake and Inlet tube
H&R Springs
MHD Stage 2 E40
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