There is a sign on the gasoline pump that says the fuel is temperature is corrected to 15 C. What does this mean?
Gasoline, like everything else, expands as it gets warmer and contracts as it gets colder. Without temperature correction, a litre of gasoline on a warm day would contain less gasoline by weight than on a cold day. Gasoline is sold by volume but what you are actually paying for is the energy to make your car go. Temperature correction ensures that, regardless of temperature, you receive the same amount of energy for your purchase although the volume may differ.
