Assuming when you fill up you take 16 gallons of fuel, this will cost you an extra $3.20, not worth taking a chance for that difference in price. This reminds me of my father who will drive across the river to St. Louis because the gas is usually 10 to 12 cents cheaper per gallon. I told him he is not saving that much if any considering it is approximately a 23 mile round trip and his car gets about 17 mpg.