Toronto's stations (Petro-Canada, Esso and Shell) line Highway 401, the DVP and the Gardiner, with prices in cents per litre that move with Ontario taxes and the carbon charge. Downtown sites are fewer, so many drivers fill near the highways.
Prices in Toronto appear when a driver reports one or an official feed carries it, always with the time it was recorded, so you can judge for yourself whether it is still true. See Toronto on the map →
Plan your stop
In Toronto the filters that actually narrow things down are diesel (91) and CNG (3). Travelling at night, switch on "open now": 35 places are tagged 24/7. When you arrive, a quick confirmation keeps the map right for the next driver in Toronto.