Spot premium for very low sulphur fuel oil (VLSFO) dipped on Thursday, while onshore stockpiles at Singapore rose for a second consecutive week. The Singapore cash premium for VLSFO was pegged at $8.25 a metric ton, reflecting competitive offers and a weaker backwardation at the prompt months. Meanwhile, refining cracks LFO05SGDUBCMc1 dipped below premiums of …