RE: Mercury 250 Pro XS octane ?
Actually I have been told by some very good mechanics and an oil industry engineer that running premium in an engine that is set up to run regular is very bad for the engine? They said that one of the grades (I have forgotten which, but I think regular) burns hotter and that running hi test would result in uneven fuel burn??? Just what I have been told == I have no personal knowledge although I did stay in a Holiday Inn express this year LOL !
rod bender bob
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