Brent rose to about $93.78 and WTI to about $87.83 a barrel on 20 Aug 2026, up for five straight sessions after the US threatened tougher economic pressure on Iran. Thai Oil's analysts say prices may stay high near term because the Strait of Hormuz remains far below pre-war traffic, and the conflict shows no clear sign of easing. For SMEs, assume diesel and transport costs stay elevated for now, review delivery and logistics pricing, and check fuel-linked supplier surcharges.