Fuel Prices: Domestic petrol and diesel prices vary across states due to value added tax (VAT).Petrol, diesel prices today: Petrol and diesel prices are unchanged across the metros on Wednesday, May 19. In Delhi, petrol prices are constant at Rs 92.85 per litre and diesel prices are steady at Rs 83.51 per litre, according to Indian Oil Corporation. Petrol and diesel prices are the highest in Mumbai. In Mumbai, the petrol price stands at Rs 99.14 per litre and diesel is sold at Rs 90.71 per litre, according to the state-run oil refiner. The fuel prices have been hiked ten times since May 4, when the state-owned oil companies ended a hiatus in rate revision that was observed during assembly elections. Petrol and diesel prices vary across states due to the value-added tax or VAT. (Also Read: How To Find Latest Petrol, Diesel Rates In Your City)Below are the latest petrol and diesel prices across four metro cities:The state-run oil marketing companies including Indian Oil Corporation (IOC), Bharat Petroleum, and Hindustan Petroleum align the rates of domestic fuel with the global crude oil prices by taking into account changes in the foreign exchange rates. Any changes in fuel prices are implemented with effect from 6 am every day.Meanwhile, oil settled lower on Tuesday after media reports said the United States and Iran have made progress on reviving a deal restricting the OPEC country’s nuclear weapons development.Brent crude settled down 75 cents, or 1.1 per cent, at $68.71 a barrel and U.S. West Texas Intermediate (WTI) crude settled down 78 cents, or 1.2 per cent, to $65.49.