Recommended for all recent engines, multivalve, and turbocharged, direct injection, with or without catalytic converter. Particularly adapted to recent Mercedes-Benz, BMW vehicles equipped with a post-treatment system. Adapted to VW motors with direct injections. Especially adapted to VW direct injection system. Suitable for all journeys (in town, on highways, or motorways) and particularly in severe conditions. For all driving styles, particularly « vigorous » and high speeds.