Originally posted by LBVSVT:
One thing you all need to remember too is that the gas companies (for the most part) temperature correct their gas (to 15Celsius here in Canada). What that means is when the temperature is below 15 and the pump says you got 50 litres, you really got less than 50 litres. The opposite is true in the summertime...
Actually, it's the other way around.
The meter at the gas station measures volume. The pump is calibrated at a standard temperature (15 C), but metered volume is metered volume regardless of temperature. The fuel may subsequently warm up or cool down in your car's tank, which would change its volume, but you got close to the indicated number of liters at the time you filled up.
If you fill up on a cold morning, the density of the gasoline is higher, so you get more kg per liter of fuel, but the blissfully ignorant meter can only tell you how many liters you took.
Garrick
