Thread: E85 on S63tu
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Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Posts: 21,115
Join Date: Oct 2012
Car: 135i
Default 04-15-2017, 03:21 PM

If you want to run E85, I'd recommend doing a backend flash as well. Our M5 runs straight E85 (E54 here) with the JB4 and a BM3 flash. Without the flash you will be really limited on the ethanol content you can run. The other option is to run meth as well.

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