In this summer of discontent, it's a partial relief for the aam aadmi. After the steepest hike of Rs. 7.54 a litre in the petrol prices last month, state-owned oil companies today announced a reduction of Rs. 1.68 per litre in petrol prices, excluding taxes. In Delhi, after including 20 per cent VAT, the reduction will be Rs. 2 a litre.