Petrol and diesel (non-branded) prices (Indian Oil) today in major cities were slightly higher than the previous day's price.  Petrol price in Delhi today was Rs 72.39, against yesterday's Rs 72.32, while in Kolkata it was Rs 75.12 against  Rs 75.06 yesterday.  Petrol prices in Mumbai were at Rs 80.26 against Rs 80.19 in the previous day, while in Chennai it was  Rs 75.07 against yesterday's price of Rs75.00.  
 
Diesel prices today in Delhi, Kolkata, Mumbai and Chennai were Rs 62.96, Rs 65.65, Rs 67.05 and Rs 66.39, respectively. Diesel prices yesterday in Delhi, Kolkata, Mumbai and Chennai were Rs 62.89, Rs 65.58, Rs 66.97 and Rs 66.31, respectively.
 
How is price revision in petrol is done?
 
The petrol stations in India can be clubbed into two categories -- automated petrol bunks and non-automated petrol stations. Automated petrol bunks are fewer in number and revise the petrol rate automatically, according to bankbazaar.com.
 
In case of non-automated petrol bunks, the revision is done manually at 06:00 am every day. Dealers are intimated next day’s price by oil marketing companies at 8 pm.
 
Even as dynamic fuel pricing is beneficial for end petrol consumers and dealers, the daily revision impacts the financial and economic health of any state. Daily price revision ensures 100% fuel pricing transparency.