Consumers are used to paying attention to miles per gallon, especially when looking for a new car.
But an even more important number might be cost per mile.
GasBuddy.com this week released a massive database that breaks down the cost per mile for vehicles nationwide and by state. The list shows a stark contrast among both vehicle fuel efficiency and local fuel prices.
Assuming an average price of $3.43 per gallon, the report found that Oklahomans pay between 6.9 cents and more than 34 cents per mile.
Topping the list is the Bugatti Veyron with a combined city and highway cost of 34.3 cents per mile, although I doubt there are very many Oklahomans who drive the French sports car.
I certainly haven't seen one cruising down Interstate 35.
Oklahoma is a truck state, with the top 10 vehicle models in Oklahoma City overwhelmingly dominated by trucks, especially the Ford F-series models, according to R.L. Polk and Co.
The four-wheel-drive, V-8 F-150 clocked in at 26.4 cents per mile, while the front-wheel-drive F-150 carries a much less-expensive cost of 18.1 cents per mile.
Oklahoma City's No. 2 selling vehicle last year was the Chevrolet Silverado, which ranges from 16.3 cents per mile for the two-wheel-drive hybrid to 22.9 cents for the four-wheel-drive model.
The Dodge Ram ranges from 17.2 cents per mile for the smaller engine to 21.5 cents for the V-8 model.
Chevrolet's Equinox crossover vehicle claimed No. 6 in sales in Oklahoma City in 2012, carrying an average cost of 13.2 cents per mile for front-wheel-drive and 14.9 cents per mile for all wheel drive.
The city's top-selling sedan is the Honda Civic, which costs 10.7 cents per mile to fuel, topping the next most popular Toyota Camry, which averages 12.3 cents per mile in Oklahoma.
The Toyota Prius boasts the lowest cost for a gasoline-powered vehicle at 6.9 cents, besting its plug-in hybrid cousin by one-tenth of a penny.
The GasBuddy list did not include bi-fuel and most alternative fuel vehicles.
But it does include my natural-gas-powered Civic.
The natural gas engine is slightly less efficient than its gasoline-powered brother, but at an average fuel cost of $1.21 per gasoline gallon equivalent, it boasts a cost per mile of just 3.9 cents, about one-third the cost of the gasoline-powered model.