Fuel prices in Brisbane have averaged $1.50 per litre today, as part of a rise of around 20 cents over the last week.

RACQ spokeswoman, Renee Smith, has advised motorists to boycott the big fuel retailers when prices are unreasonable, claiming they are taking advantage of the back to school rush.

Ms Smith has also stated that vehicle owners should support cheaper service stations where they can, and wait for prices to drop.