CHENNAI: In Chennai, the price of petrol and diesel has remained unchanged for the past 78 days.

Accordingly, one litre of petrol cost Rs 100.75 and diesel costs for Rs 92.34 in the city.

Additionally, the oil companies use the current crude oil price on the global market and the value of Indian rupee compared to the US dollar as a primary variable to determine the pricing of petrol and diesel on day to day basis