General questions sent to companies whose fuels Public Eye sampled and their answers: Addax and Oryx Group/Oryx Energies; Vitol/Vivo Energy; Trafigura/Puma Energy; Lynx Energy/X-Oil Congo

Specific questions and answers: Addax and Oryx Group/Oryx Energies; Vitol/Vivo Energy; Trafigura/Puma Energy; Lynx Energy/X-Oil Congo; Mocoh; Mercuria; Glencore