The 20:01 snapshot puts Brent at $101.266/bbl and WTI at $89.771/bbl. Both benchmarks nudged higher, yet the spread compressed from $12.00 to $11.50. The compression came not from a stronger WTI but from Brent appreciating more slowly — the structural premium for light-sweet grades is intact, just moving at a slower pace.

The yuan stayed pinned at 6.705, barely moving. For a trader running crude on a delivered-duty-paid basis, that holds the landed cost (CIF plus tariff and VAT converted at the spot rate) steady, so there is no need to reprice quotes for FX. What is actually moving is the grade ranking: ESPO, Dubai and Oman — short-haul, low-sulfur, light-sweet barrels — have re-ordered their economics against Urals and the Basrah medium/heavy grades.

A teapot refiner's math is blunt. Light-sweet crude yields more naphtha and gasoline blendstock, which earns an extra processing margin at today's crack spreads; but heavy, high-sulfur barrels carry deeper discounts (Basrah heavy spot is already at a hidden discount near -$37), and players who bet on deep-refining conversion are still buying them. A sub-$1 swing in that gap is enough to flip a monthly procurement plan.

Operationally, the short-haul light-sweet buying window reopened this week. As an offshore supplier, SNSUC can lock vessel stems early at the Sohar or Fujairah STS anchorages; the deepening discount on heavy grades suits a back-to-back LC spread trade rather than a one-way inventory build.