baggedx56 Posted January 3, 2009 Report Share Posted January 3, 2009 hey guys im new to this site and i just got an 03 ss i need to know what octane fuel to use because ive been reading and heard 91 and higher and also heard 87 Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted January 3, 2009 Report Share Posted January 3, 2009 The SS requires 91 or higher octane because the LQ9 6.0 has high 10.08:1 compression. Anything lower then 91 will cause knock/ping/detonation/lower MPG/less power. welcome to the site Quote Link to comment Share on other sites More sharing options...
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