use the premium fuel, you should not have a real issue there, make sure the tune is kept up and replace the fuel filter at a more regular intervals. Fit a correct air filter as if the housing is not sealed unfiltered air will enter the engine which is not advisable. As for the horse power issue, there is not a lot you can do with out spending some serious $$$$ so check your budget and remember horsepower costs fuel to produce.
August, 30, 2008 AT 11:25 PM
Like mark said: " use the premium fuel, you should not have a real issue there". But you will not gain any hp by doing this, only a bigger hole in you pocket.