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I have been running Shell 87 octane fuel in my AWD Terrain since the first fill up. Has anyone used Premium in their I4 and if so did you notice an increase in MPGs?
My C5 Corvette (back when it was stock) ran much better with premium. Just wondering if anyone has tried this.
Thanks for the input
Fireman591
My C5 Corvette (back when it was stock) ran much better with premium. Just wondering if anyone has tried this.
Thanks for the input
Fireman591