New survey tells you what a new car costs to drive

GasBuddy.com, a website that uses data from volunteers, gas stations and other sources to keep track of gas prices nationwide, ranked more than 750 vehicles from the 2013 model year based on the cost of fuel per mile driven. The survey used the average gas price in July — $3.59 per gallon — and measured vehicles based on their combined city and highway mileage, as calculated by the Environmental Protection Agency.

Honda vehicles performed best, averaging 12.8 cents per mile. General Motors Co.'s GMC brand was worst, averaging 21.2 cents.

After Honda, the most efficient brands were Kia, Hyundai, Volkswagen, Mazda, Subaru, Mitsubishi and Toyota. The worst performers, after GMC, were Cadillac, Mercedes-Benz, Jeep, Jaguar, Infiniti, Chevrolet, Dodge, Porsche and Chrysler.

GMC spokesman Brian Goebel pointed out that the brand's lineup is all trucks and SUVs, and lacks small cars to bring down the average. GMC's smallest vehicle is the Acadia midsize SUV, which gets 19 mpg and costs 15 cents per mile to fuel it up. By comparison, Honda's smallest U.S. vehicle, the subcompact Fit, gets a combined 31 mpg, and costs 10.3 cents per mile.

Goebel also said the brand is improving. The 2014 GMC Sierra pickup, which went on sale in June, now gets up to 20 mpg in combined city and highway driving, an improvement from 17 in the previous model year.

The most efficient car, the Toyota Prius C hybrid subcompact, costs 7.2 cents per mile. The least efficient vehicle, a Bugatti Veyron sports car with a 16-cylinder engine, costs 35.9 cents. The difference is substantial. Assuming you drive 12,000 miles per year, the Prius C would cost you $864 to fill up; the Veyron would cost you $4,308. But anyone who buys the $1.3 million Veyron probably isn't too worried about fuel costs.