The upward trend in oil prices is inevitably a source of concern for major users, particularly transport companies. The harsh winter, strong global growth (except in Europe) and OPEC's production policy are the main reasons often cited to explain this increase. Less often mentioned is the strategy of oil companies. Yet they are the main beneficiaries of particularly high prices, as evidenced by the huge profits announced by the world's leading companies. Add to this the windfall in tax revenue for governments (especially in France), and it is clear that oil is likely to remain very expensive for a long time to come.