KOCHI: Fuel prices were hiked for the 8th time in the last 10 days on Sunday amid firm global crude oil prices. On Sunday, the price of petrol in Thiruvananthapuram was increased by 21 paise per litre to Rs 84.34. Similarly, the retail price of diesel has been increased by 30 paise per litre to Rs 78.12 per litre. In the last 10 days, the price of petrol has increased by Rs 1.45 while that of diesel increased by Rs 2.21 per litre.