The average recreational vehicle was even older with a mean age of 12.5.
Five years ago, automakers charged $25,500 for the average new vehicle.
In 2007, the average new vehicle sold for about $28,000.
A fill-up will take about two minutes for the average vehicle, Shell officials say.
Over the last two decades, the average vehicle has doubled to about 200 horsepower from 100.
However, the most dramatic improvement has been the shaving of 1,000 pounds from the average vehicle since 1973.
A Card can save approximately five minutes each trip for the average vehicle.
Since 1981, the average vehicle has 93 percent more horsepower and is 29 percent faster in going from 0 to 60 miles an hour.
With the average vehicle on the road today getting 21 miles a gallon, that comes to about $360 in fuel costs round trip.
It is somewhat smaller than the engine in the average light-duty vehicle.
