The Consumers' Association has condemned Texaco for increasing the price it charges for petrol and diesel.
The company has hiked the price of a litre of unleaded to €1.21, while a litre of diesel now costs €1.17. These prices are around 20% higher than those being charged at this time last year.
Consumers' Association spokesman Michael Kilcoyne said the Government should take action to get the situation under control.
"It is unacceptable the way consumers are being treated in relation to the price of petrol...I demand that the new consumer agency take steps to stop this spiral of price increases," he said.