Gasoline prices are mixed across the country compared to the week before. The national gasoline average is $.92 above the price this time last year. Diesel fuel is about $1.00 above this time last year. The national premium fuel price is $3.92.

Source: Energy Information Administration, 7/11/11. Figures rounded to the nearest cent.

See our guide to fuel economy for advice on saving gasoline, including reports on how to get the best gas mileage and where to find the cheapest gas. Learn about future technologies in our guide to alternative fuels.