For all my reporting life, I’ve dreaded one question: What is the price of oil — the real one? Invariably asked during a crisis, it demands a neat answer, a precise dollar-per-barrel figure. But each time my reply is anything but: It depends on what kind of crude we’re talking about, when it is being sold and where.The Iran crisis is no different. Rather than offering a single price, what I can attempt is to shed light on today’s physical and financial oil markets, and why you can pick up a barrel of crude for $78 in Kansas or $286 in Sri Lanka.In the midst of the latest Gulf conflict, oil has been an economic weapon and propaganda tool. Both Tehran and the U.S. had been blockading shipments through the vital Strait of Hormuz waterway before at least a temporary reopening on Friday, and trying to jawbone the market in their favor.Be wary of anyone saying one particular oil-price gauge matters more than the others. Whoever is betting on the cost of crude going up will argue Friday’s relief selloff doesn’t reflect reality, with shipping still severely disrupted. Those betting on a fall will have had their own views confirmed.