Rebadge shj.

SENG was a major distributor for BP back then. After BP sold the petrol station biz to Boustead. SENG lost the exclusive distributorship. Subsequently half of the stations under the group was converted to Caltex, while half stayed with BHP.

Currently they're in the process of converting the stations using Caltex brand to FIVE. Product wise, most probably coming from the refineries in PD lah.