You won't get enough of an increase to offset the more expensive gas.Broke 10k mikes just before Christmas, with my routine and heavy foot I'm a steady 27.5 MPG without trying - and always with 87 octane.
oddly I just decided to try premium fuel for once, and I'm now steady at 28.5 MPG and haven't changed anything, so I may keep using premium for a few tanks to see if I'm getting a noticeable difference.
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