Crowd-sourced data
Submit your car’s real mileage
Brochure figures come from a lab. Ours come from you. Every report makes the real-world averages on this site more useful to the next person deciding what to buy.
Frequently asked questions
What mileage figure should I report?
Report your long-run average, measured tank to tank rather than read off the trip computer. If you have three or four fill-ups logged, average them. A single unusually good highway tank skews the data for everyone.
Do I need an account?
No. There is no sign-up, no password and no email required. Give a name only if you want your report attributed.
What happens to my submission?
Figures within a plausible range for the fuel type publish immediately and feed into the model’s real-world average. Anything outside that range is held for manual review, which usually takes a day or two.
What data do you store?
Only what is on the form: car, variant, fuel type, mileage, city, driving style, an optional display name and an optional comment. No email, no phone number, no location tracking. See our privacy policy for detail.