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You should not run E85 on a stock car without an tune for E85.
It should not hurt anything, the N54 and N55 have successfully been running E85 tunes as well.
MPG, it's a guess, I would say a 20% drop is a good guess.
Warranty, just like the tune itself, if a component fails unrelated, like a blown strut-they would not be able to prove it. But if something fails, like a fuel injector, they may try and blame the tune and E85.
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'98 Dinan/RMS stage 2+(VAC cams, CES Cutring etc)
'15 Buick Regal "T"(wife)
'06 Saab 9-5 Combi 5mt (full suspension, LSD, clipped turbo etc) |