How on earth can these things happen?

[Don Petter]

And doesn't everybody know that a gallon of water weighs ten pounds?

Or, as I was taught it:

'A pint of pure water weighs a pound and a quarter'

[LeMartinPecheur]

Take the MPG and divide by 5 and add a bit.

The metric system is upside anyway they talk of litres per 100 kM.

Fuel consumption. If you take your miles travelled since last fill-up, divide it by the litres bought, then divide the result by 0.22 you'll get a very decent approximation to mpg.

[cloughie]

Fuel consumption. If you take your miles travelled since last fill-up, divide it by the litres bought, then divide the result by 0.22 you'll get a very decent approximation to mpg.

...and if you don't divide by 0.22 you have the miles per litre - so if I multiply the mpg figure on my gauge by .22 I have the mpl.

[alycidon]

For a consistent bloke, I'm very inconsistent with this. I have my car temperature gauge set to Celsius in winter, and then Fahrenheit in summer. I get a better idea of the relative temperature in that way.