Petrol and diesel prices remained unchanged across major Indian cities on December 17 after the daily 6 am revision by Oil Marketing Companies. Petrol is priced at ₹94.72 per litre in Delhi, ₹104.21 in Mumbai and ₹103.94 in Kolkata, while diesel sells at ₹87.62 in Delhi, ₹92.15 in Mumbai and ₹90.76 in Kolkata, despite global crude oil volatility.