Many oil companies and gasoline retailers carefully track the temperature, volume and exact value of their supplies every step of the way from well to gas station, where the measurement often stops.
Now, two lawsuits out of Kansas have been merged into a class action suit alleging that many big gas retailers are directly causing consumers to get less for their money when fuel is sold hotter than the industry standard of 60 degrees Fahrenheit.
They call it "hot fuel," which has expanded at time of sale beyond the volume at which the value was based, resulting in more of a product that carries less energy.