Posted Apr 10, 2007 05:11 pm CDT
At least nine lawsuits around the country claim that some gas stations are padding profits by selling warm gasoline, ABC News reports.
Gas expands when it is warmed, so drivers get less of it in their tanks in hot weather. The fuel industry standard says gas should be sold at 60 degrees Fahrenheit.
The network cites an investigation by the Kansas City Star that concluded American drivers may overpay $2.3 billion a year. They are hardest hit in warm states.
In Canada, gas pumps are controlled for outside temperature.
An industry spokesman says the claims are not credible, and the expansion only amounts to about a tablespoon in 12 gallons of gasoline.