July 25, 2012. Petrol and diesel prices were hiked in seven states like West Bengal and Maharasthra and that of domestic LPG in six states as state-owned oil firms recalibrated rates to reflect changes in local levies. The exercise also resulted in petrol and diesel prices being reduced in 11 states like Karnataka, Goa, Gujarat and Odisha. Besides, LPG prices were reduced in 12 states including Gujarat, Tamil Nadu, West Bengal and Odisha.