Petroleum companies have today increased the price of petrol by up to 40 paise, while there has been no change in the rate of diesel. After this increase, petrol in Chennai has reached Rs 100.13 per liter for the first time, while diesel is unchanged at Rs 93.72 per liter. In the national capital, petrol went up to Rs 99.16 per liter, but diesel remained at Rs 89.18 per liter. In Mumbai, petrol price hiked by 35 paise to reach Rs 105.24 per liter on Friday. Petrol price in Kolkata has reached closer to the Rs 100 mark at Rs 99.04 per liter, while diesel is unchanged today at Rs 92.03 per liter.