Historic Oil Output Cuts Give Boost to World’s Dirtiest Crudes

Historic Oil Output Cuts Give Boost to World’s Dirtiest Crudes (Bloomberg) — Heavier and more sulfurous oil is getting a price boost as production curbs by the OPEC+ alliance tighten the supply of what’s generally regarded as lower-quality crude. Abu Dhabi’s Upper Zakum, a grade with high sulfur content, is at the narrowest discount against …