If the external ambient temperature is colder than the temperature of the fuel comming out at the fuel pump (usually after the the sun has been hitting the ground for a while), trust me on this, the fuel is less dense than the equivalent shown on the meter of the pump; therefore, you are paying a bit more for what you are really getting. If the EPA and "other agencies" said that, they must be doing their tests on pumps that can sense the external temperature, internal temperature and compensate for the temperature difference while controlling the flow of the fuel pump. Don't know if they have such pumps that will do that instantenously. I think the EPA is full of BS as well as those other agencies. I take it you also believe that drilling for oil in Alaska, Gulf of Mexico and other places that belongs to the USA (us) will hurt the enviroment...right? Until we do that here, regardless of the temperature,...lol...we will pay more money for gas. Here is another tip when refueling .....# 8) Set the handle-lever-lock of the fuel pump to the lowest setting. It will take longer to fillup the tank, but you will reduce the amount of air mixed up with the fuel.