Gov., DeWine wants lawmakers to put the brakes on a proposal…to halt the collection of Ohio’s newly increased taxes on gas and diesel fuel. The governor and GOP lawmakers reached a deal in 2019 to boost Ohio’s tax on gas by 10.5 cents a gallon…and the tax on diesel fuel by 19 cents…to help maintain deteriorating roads and bridges. Ohioans now pay a state tax rate of 38.5 cents per gallon on gas and 47 cents a gallon on diesel.