Tupras Turkiye Petrol Rafinerileri A.S.

Tüpraş runs Turkey's only large-scale refining operation, buying crude oil in US dollars, shipping it through the Bosphorus on its own Ditaş tankers, processing it across four refineries, and selling the finished fuel through the Opet retail network — all without handing a margin to any outside logistics provider. Because each step of that chain is owned within the same company, Tüpraş captures a slice of profit at the tanker, at the refinery gate, and at the pump rather than sharing it. The problem is that crude is priced in dollars while fuel is sold in Turkish lira, so whenever the lira weakens sharply, the spread between what Tüpraş pays for crude and what it receives for petrol and diesel shrinks at all four refineries at once, and no improvement in how efficiently the plants run can close a gap that sits in the exchange rate rather than in the operation. A competitor could not simply build a fifth refinery to challenge this — they would also need Bosphorus-cleared tanker contracts, the government's strategic reserve agreements, and a retail network whose delivery schedules are already wired to a refinery's production cycle.