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.