India could face an additional $1.8-3.7 billion annual oil bill if it replaces just 1 million barrels per day (bpd) of Russian crude with supplies costing $5-10 a barrel more, highlighting the potential cost of any sharp shift in sourcing under US tariff pressure. Replacing around 2 million bpd could roughly double that impact, though the estimate is only a sensitivity calculation and not a forecast of the current price differential, said Natalia Katona, a UAE-based freelance commodity analyst.