Two major French supermarket chains are launching 'at cost' fuel operations over the first weekend of the summer getaway, as fuel prices remain higher than usual despite recent falls. The Mousquetaires group, which owns Intermarché and Netto, will sell fuel at cost price on Friday, July 3, and Saturday, July 4, covering petrol (SP95, SP98, E10) and diesel, but not superethanol E85 or LPG. No voucher or registration is required for this offer.