For the second time this decade, a war has upended global oil markets and sent oil prices and refining margins to multi-year highs, benefiting the world’s biggest oil companies and top refiners.

War-driven supply disruptions have turned oil refining into Big Oil's biggest profit engine, but Reuters columnist Ron Bousso says the windfall may prove temporary as capacity…

Bumper oil refining profits triggered by the Iran war are turbocharging Big Oil’s earnings, breathing new life into a business many investors had largely written off.