MUMBAI: Petrol and diesel prices in Mumbai, Thane and Navi Mumbai dropped on Sunday. Petrol price in Mumbai fell by 17 paise and is retailing at Rs 107.66 per litre. Diesel rate dropped by 20 paise for fourth consecutive time in five days and is being sold at Rs 96.64 per litre. In neighbouring Thane and Navi Mumbai, petrol price dropped to Rs 107.80 while diesel rate dipped to Rs 96.77 per litre.