Sources

Every figure on TheCarCodex.com comes from one of five official datasets, published for reuse by the authorities below.

European Union

The European Environment Agency (EEA) publishes data on every new car registered in the EU, Norway and Iceland since 2010, under the CC BY 4.0 licence. Source: European Environment Agency (EEA).

United Kingdom

The Vehicle Certification Agency (VCA) publishes the fuel consumption and CO₂ figures of new cars on sale in the UK since 2000. Contains public sector information licensed under the Open Government Licence v3.0.

France

ADEME publishes the Car Labelling data of new cars on sale in France, under the Licence Ouverte / Open Licence 2.0.

United States

The U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy publish fuel economy data for vehicles sold in the United States since model year 1984, on fueleconomy.gov. It is a U.S. Government work in the public domain.

Canada

Natural Resources Canada publishes fuel consumption ratings of new light-duty vehicles sold in Canada since model year 1995, under the Open Government Licence – Canada.

The datasets

European Union

Dataset
Monitoring of CO₂ emissions from passenger cars (Regulation (EU) 2019/631)
Publisher
European Environment Agency (EEA)
Licence
CC BY 4.0
Downloaded
Sep 29, 2026
What the figures are
New cars registered in the EU (plus Norway and Iceland), from the European Environment Agency. Figures on the NEDC procedure until 2020 and on WLTP from 2021; versions are grouped by engine and power, with their number of registrations.

United Kingdom

Dataset
Car fuel and emissions information
Publisher
Vehicle Certification Agency (VCA)
Licence
Open Government Licence v3.0
Downloaded
Sep 29, 2026
What the figures are
New cars on sale in the UK, from the Vehicle Certification Agency. NEDC figures until 2018 and WLTP figures after; years are the editions a version appeared in.

France

Dataset
Car Labelling / Émissions de CO₂ et de polluants des véhicules commercialisés en France
Publisher
ADEME
Licence
Licence Ouverte / Open Licence 2.0
Downloaded
Sep 29, 2026
What the figures are
New cars on sale in France, from ADEME Car Labelling. NEDC figures until 2015, WLTP figures in the current catalogue.

United States

Dataset
Fuel economy data (vehicles.csv)
Publisher
U.S. Department of Energy and U.S. Environmental Protection Agency, fueleconomy.gov
Licence
Public domain (U.S. Government work)
Downloaded
Sep 29, 2026
What the figures are
Model years sold in the USA, from the EPA and the Department of Energy (fueleconomy.gov). MPG on the EPA test; litres per 100 km = 235.215 ÷ MPG.

Canada

Dataset
Fuel consumption ratings
Publisher
Natural Resources Canada
Licence
Open Government Licence – Canada
Downloaded
Sep 29, 2026
What the figures are
Model years sold in Canada, from Natural Resources Canada fuel consumption ratings (5-cycle test).