If you're running on fumes, today is the day to fill up.
Dan McTeague with GasBuddy.com says gas prices are set to rise by 7 cents per litre on Friday.
The average price in the GTA will be 104.9 cents per litre.
McTeague says that lately, Ontario refineries have been selling gas at or below their usual cost, but now they're looking to get those margins back.
He doesn't expect prices to go back down with a federal carbon tax coming in April and the switch from winter to more expensive summer gasoline.