You can pump more autogas when it’s cold outside

Some people believe in the urban myth that buying autogas at night or early in the morning can save money. People tend to fill their tanks in the colder part of the day hoping to get cold gas. They believe that cold autogas is denser as it is not expanded by the heat and that they will get more fuel for the same money at night when it is colder.

Unfortunately for them, fuel stations mostly store their LPG gas in underground tanks, where temperature almost never varies at all between day and night. Even if you succeed in buying cold LPG, you will save up maximum 1% per fill-up. Is it worth to wake up early and save almost nothing?