The increases are nothing new for Montrealers, who were subjected to numerous unnecessary price hikes in 2012, especially before holiday weekends, according to CAA Quebec.
"It is very disturbing to see so many unjustified increases," said Sophie Gagnon, CAA-Quebec's assistant vice president for public and government relations.
Out of 12 gas price hikes observed in Montreal in 2012, CAA deemed eight of them to be unjustified.
"When motorists take advantage of the weekend to escape to visit family or friends, the industry makes sure it gets the maximum profit … by imposing increases with no basis," Gagnon said.
Compared to Québec City and Sherbrooke, Montreal-area drivers suffer the most from the pre-weekend price jacking.
Gas taxes in the city are also the highest among Canada's largest cities. Montrealers pay about 36 per cent in tax on top of the average price for a litre of gasoline. The overall Canadian average is 31 per cent.