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This thread is confusing. I just put 300 miles on a tank of E30 (4.25 gallons E85 + Shell 93) running the v1.08 Stage 2+ E20 tune. Was that a no-no? The car ran great and my logs look good. I flashed back to the 93 octane tune this afternoon.
I thought the E85 tune was not for stock fuel systems. MHD app and website are unclear.
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