Ok ok I will write in sentences, my wife yells at me too for that also . U will have to bare with me with spelling. You stated that if I run 89 octane on 87 tune (meaning the 87tow tune?)I can advance my timing myself on custom tunes. How hard is that to do step by step or harder and what kind of mpg do u get .One more thing my truck is a flex fuel truck but never use that e85 its not around here does that matter. thanks again Shawn
Last edited by not you; Sat, July 25th, 2009 at 01:31 PM.
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