9.9 merc bigfoot

M

markmwm

Cadet
Joined
Aug 20, 2005
Messages
9
in a 2002 merc 9.9 bigfoot what is the best octane of fuel to use. and should we ever use 10% metanol, or stabilizer or octane boost. Thanx
 
Z

ZmOz

Captain
Joined
Aug 13, 2003
Messages
3,949
Re: 9.9 merc bigfoot

87 octane. Anything more is throwing your money in the toilet. No, you should never use 10% METHANOL in any gasoline engine...but 10% ETHANOL like they sell at the pumps is fine.
 
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