Industry
- The African Refiners and Distributors Association (ARDA)
- Afton Chemical
- Alliance of Automobile Manufacturers
- American Honda
- Association for Emission Control by Catalyst (AECC)
- Association of European Automobile Manufacturers (ACEA)
- Association of Global Automakers, Inc.
- Fleet Forum
- International Fuel Quality Center
- International Petroleum Industry Environment Conservation Association
- Japan Automobile Manufacturers Association
- Kjaer Group A/S
- Lubrizol Corporation
Government
- Democratic Republic of Congo - Ministère de l'Environnement, Conservation de la Nature, Eaux et Forêts
- Environment and Climate Change Canada
- European Commission
- Ghana Environmental Protection Agency
- Indonesian Ministry of Environment
- Lagos Metropolitan Area Transport Authority (LAMATA)
- Mexico - Instituto Nacional de Ecologia (INE)
- Mexico Office for Environment and Natural Resources (SEMARNAT)
- Ministry of Environmental Protection (MEP, China)
- Mozambique Ministry for Coordination of Environmental Affairs
- National Automotive Council (Nigeria Ministry of Industry)
- National Environment Management Authority (NEMA) - Kenya
- Netherlands Ministry of Infrastructure and the Environment, Project Directorate Biofuels
- Nigeria Federal Ministry of Environment
- Standards Organization of Nigeria
- U.S. Agency for International Development
- U.S. Environmental Protection Agency
- Yemen Environment Protection Authority
Non-Governmental Organisations
- Asian Clean Fuels Association
- Caucasus Environmental NGO Network (CENN)
- Centre for Environment and Development for the Arab Region & Europe (CEDARE)
- Centre for Science and Environment
- Centro Mario Molina Chile
- CEGESTI
- Environmental and Energy Technology and Policy Institute
- FIA Foundation
- Forum For Environment
- Global New Car Assessment Programme (Global NCAP)
- Komite Penghapusan Bensin Bertimbel (KPBB)
- Lawyers' Environmental Action Team (LEAT)
- Natural Resources Defense Council
- Observatoire du Sahara et du Sahel / The Sahara and Sahel Observatory (OSS)
- Petroleum Institute of East Africa (PIEA)
- Regional Environmental Centre for the Caucasus (REC Caucasus)
- Scientific and Research Institute of Motor Transport (NIIAT)
- The LEAD Group Inc
- Trust For Lead Poisoning Prevention
- World Resources Institute
- Manufacturers of Emission Control Association
- National Association of Automobile Manufacturers of South Africa (NAAMSA)
- OKTA AD Refinery Skopje
- Organisation Internationale des Constructeurs d'Automobiles (OICA)
- International Organization of Motor Vehicle Manufacturers
- Petrobras
- Petroleum Corporation of Jamaica
- Society of Indian Automobile Manufacturers
- South African Petroleum Industry Association (SAPIA)
- Sustainable Transport Africa (STA)
International Organisations
- Association of Southeast Asian Nations (ASEAN) Working Group
- Central American Commission on Environment and Development
- Clean Air Asia
- Global New Car Assessment Programme (Global NCAP)
- International Energy Agency (IEA)
- Regional Environment Centre for Central and Eastern Europe (REC-CEE)
- South Asia Co-operative Environment Programme (SACEP)
- United Nations Dept for Economic & Social Affairs
- United Nations Environment Programme (UNEP)
- United Nations World Food Programme (WFP)
Others
- Universidad Nacional de Colombia
- CITAC AFRICA LLP
- Egerton University
- Independent Consultant
- The LEVON Group, LLC
