91 No Ethanol
Would the 91 be too high of an octane for my 1977 1450? Or would you run 87 with an additive to negate the ethanol? I thought I was doing my boat a favor by using the 91 until the mechanic informed me otherwise.
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1982 CC 680 HYDRO
1977 IH 1450
1992 WH 314-8  lol
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