Enter your registration for your car's official combined fuel economy, its CO₂ figure and tank size, the three numbers that decide what it costs to run.
✓Official combined MPG
✓CO₂ emissions in g/km
✓Fuel tank capacity
✓Engine size, fuel type and Euro status
✓Plus road tax cost, MOT history and valuation
Published economy figures come from a standardised laboratory test, which is what makes them useful for comparing two cars fairly. Almost nobody matches them in daily driving. Older figures from the NEDC test were particularly optimistic, while newer WLTP figures are closer to reality. Treat the number as a reliable way to rank cars against each other rather than a forecast of your own fuel bill.
A car with excellent economy can still be expensive to keep if it sits in a high tax band, and a slightly thirstier car registered in the right year can work out cheaper overall. Because the report shows the annual road tax alongside the MPG and CO₂ for the same vehicle, you can see the whole cost of ownership rather than optimising one number in isolation.
Enter your registration. The report returns the official combined fuel economy recorded for your exact vehicle, along with CO₂ and tank capacity.
Official figures come from a controlled laboratory test. Real driving involves traffic, weather, load, tyre pressures and driving style, all of which cost economy. The published figure is best used to compare cars, not to predict your own consumption.