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 returns and energy transition pressures re-emerge.

Oil majors report profit surges amid Iran conflict disrupting supplies. Crude oil reaching a new all-time high by September 30 at 5.2% YES.

Oil price volatility caused by U.S.-Iran war created big market winners, but for buy-and-hold investors, there are better long-term energy themes to monitor.