Can't say you'll notice a difference. I switched to 89 octane because its been over 100* here everyday. It "seems" to idle smoother, and "seems" to have a little more pick-up from the red light. I was looking to make sure I don't get any pinging with this hot weather. Pinging will cause the timing to be retarted by the ECU, so gas mileage may come up.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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