Quote:
Originally posted by psfred
The result of running lower octane fuel is poor performance, low milage, and possible engine damage. The milage gain alone will probably pay for the difference in price.
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The times I have used premium I have never noticed any improvement in mileage. YMMV
However, to make up for the 20-cent difference in price you would have to go from 22 MPG to just over 25 MPG, assuming regular is $1.40/gal.