Focus Fanatics - View Single Post - anyone using premium gas ?
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Old 12-03-2011, 11:07 PM   #17
BowerR64
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Join Date: Sep 2010
Fan#: 78699
Location: Kansas city, MO
What I Drive: 2007 ZX3 SE

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Well i dont care to change peoples opinion really. I feel and with the SCT and the datalogs i can see the results. Anyone can do it themself, i dont really care to run a lower grade fuel to prove what i believe any more.

I know the logs arnt identical but i was pointing out that the engine has a knock sensor and if that sensor detects engine knock it will retard the timming which will lower performance. If lower grade fuel causes knock and retard timming how can it be better to use that fuel?

Even if its a slight improvement in performance IMO every little bit helps with this car.

I paid $200. for a CAI that had little improvement, $400. on a new header and exhaust with little improvement and then $420. for yet again little improvement. After all that i maybe gained 5-10hp so IMO the gain i notice with the premium isnt much compareed to what ive already put into the mods.

If i can feel the difference thats worth it to me.
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