I set out Monday to solve the great gas-price mystery on the Northwest Side.
Since the middle of the summer, those who've driven through the intersection of Irving Park and Pulaski Roads regularly, as I do, have probably been struck by the staggeringly high gas prices at the Shell mini-mart on the northwest corner.
How high? Sometimes a dollar per gallon higher than the price at the Mobil mini-mart just across Pulaski and higher than any other price in the city or suburbs. So high it was rare to see a customer at the pumps.