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Old 01-11-2010, 11:14 PM   #29 (permalink)
dalparadise
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Join Date: May 2009
Location: Houston
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I'm half way through my second tank now. It is Shell 93. I prefer either Shell or Chevron, never Exxon, Texaco in a pinch.

I'm pretty sure my first "free" tank from the dealer was either 89 or lower octane, or just of marginal quality. Either that, or my ECU is finally dialing me in. The Roadster is running smoother and stronger now...
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