Instead of working out just today's MPG, registering an account will let you watch your MPG as it changes over time. You can compare how your cars perform against each other if you have more than one, or even if your car runs differently on petrol from different places - does cheaper supermarket fuel still make sense if you don't go as far with it? By registering you can find out.

When entering Fill-up data, the form will default to these options