GM collected the fuel economy and
fill-up data through the vehicles'
OnStar system, spokesman Rob
Peterson said.As of Friday, there
were about 2,000 Volts in customer
hands, he said.He said,"what's not
being stated is that Volt drivers
who go 1,000 miles between gasoline
fill-ups are also charging their
vehicles with electricity each night
and incurring the cost of electricity,"
Electricity generally costs less, per
unit of energy, than gasoline."It's
a good marketing claim, but it's not
a practical point of comparison,"
Anwyl said of GM's 1,000-mile-a-tankful
figure.GM's 111-mpg figure, while based
on real driving and not formal testing,
at least offers something easily comparable
to other vehicles. While it's less than half
the 230 mpg the automaker unveiled to much
fanfare in the summer of 2009, it's still
much better than any other gasoline-powered
car on the road.