Originally posted by Kremithefrog:
Originally posted by todras:
Well since an SVT is tuned to take 93.  Running 91 saves you a $1 a fill up.
I thought it was tuned for 'premium' which in many places is 91 octane. Here, 93 octane is premium but just an hour north, 92 is highest commonly available. 89 is mid grade, 87 is low.
Or in Montana, you have the choice of 85, 89, and 91.
Now, going from the high altitude/91 octane to Iowa/93 octane (with 10% ethanol), I would notice a HUGE increase in performance.
I know this wasn't an anomoly since I did the drive 3 times in the SVT in different times of the year, same results each time. I'd go back to Montana and have the same ol lame performance.
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