This happened a few years back, according to wemay's link. In any event, in some ways, it doesn't surprise me. That was around the time Castrol was beginning to try to rationalize its sponsorship and service fill and factory fill models. Total, in effect, got "bounced" out of F1 some time after that with some elements to the matter being similar, with Castrol wanting to brand fully with the OEMs with which they supply, and, within the service world, to take over as the service fill partner across all lines where they are the factory fill and/or motorsport partner.