The price of Petrol has been slashed by 78 paise, a litre in Delhi. Petrol in Delhi now costs 65.64 rupees per litre against 66.42.This came in to force from midnight last night. Petrol now costs 82 paise less in Kolkata and Mumbai and 83 paise less in Chennai.This is the second reduction in two weeks. This follows firming of international prices.But, State-owned oil companies have hiked the Aviation turbine fuel – ATF – price by 3.7 per cent. This also came in to force by Midnight last night. This is the third increase in rates in a month. The price of ATF in Delhi has been raised to 2,312 rupees per kilolitre to cost 64,622 rupees.