Tulsa, Okla. — It's costing more to fill up your tank at the gas pump.
Gas prices spiked Tuesday to cost about 10-cents more per gallon for E-10 regular.
Expect to pay $2.35 per gallon at most retailers today.
Prices may rise again as refineries gear up for the summer blend that retailers sell during warmer weather to help control air pollution.
Gas prices around Tulsa were $1.86 at the end of last year.