Toronto drivers are seeing two very different stories at the pumps. Regular gasoline is getting slightly cheaper, but diesel prices are moving in the opposite direction, creating a widening gap that could eventually affect more than vehicle owners.
An October 15, 2026, forecast from Canadians for Affordable Energy initially placed regular gasoline at 178.9 cents per litre and diesel at 262.9 cents, a difference of 84 cents. A subsequent update raised the diesel estimate to 263.9 cents, widening the projected gap to 85 cents.
The divide comes amid severe international diesel supply disruptions and growing pressure on Canadian transportation businesses. While lower gasoline prices may provide limited relief to commuters, the considerably higher cost of diesel presents a different challenge for truckers, contractors and the supply chains that keep everyday goods moving.
Toronto’s Latest Forecast Shows Gasoline and Diesel Heading in Opposite Directions
The initial October 15 forecast from Canadians for Affordable Energy predicted a three-cent decline in Toronto’s regular gasoline price, bringing it to 178.9 cents per litre from 181.9 cents the previous day. Premium gasoline was also forecast to fall three cents, reaching 211.9 cents. Diesel, however, was expected to climb seven cents, from 255.9 to 262.9 cents per litre. The resulting 84-cent difference between regular gasoline and diesel was particularly striking because both fuels are derived from crude oil yet were responding to very different market conditions.
The numbers also demonstrate how quickly fuel forecasts can change. A later update from the same forecasting organization placed diesel at 263.9 cents, an eight-cent increase over the earlier October 14 estimate, while maintaining the regular gasoline prediction at 178.9 cents. En-Pro’s separate forecast published by CityNews placed regular gasoline at 179.9 cents. These differences reflect the changing nature of wholesale and retail pricing estimates. They are forecasts of regional pump prices rather than guaranteed prices at every Toronto station, and motorists may encounter different amounts depending on location, retailer and timing.
Gasoline Has Been Falling, but Recent Price Swings Show Little Stability
Toronto gasoline prices have experienced considerable volatility during October. CityNews historical pricing records show regular gasoline at 178.9 cents per litre on October 1 before climbing to 190.9 cents on October 3. Prices subsequently eased, reaching 185.9 cents on October 8 and 181.9 cents on October 14. The October 15 forecast of 178.9 cents would bring gasoline back to its early-month level, offering some relief after a period when motorists faced several sudden increases.
That movement is important because a three-cent daily decline can appear more encouraging than the broader trend actually suggests. Compared with the 131.9-cent price recorded by Gas Wizard for October 15, 2025, regular gasoline at 178.9 cents would still be approximately 47 cents more expensive per litre. For someone purchasing 50 litres, that year-over-year difference represents another $23.50 per fill-up. Retail prices also vary because stations compete locally and can change prices at different times. Consequently, the predicted regional average should be understood as a useful reference point rather than a fixed amount every Toronto driver will necessarily pay.
A Global Diesel Shortage Is Helping Explain the Widening Price Gap
The unusually expensive diesel market is not simply a Toronto problem. The International Energy Agency’s October 14 Oil Market Report describes severe constraints on global diesel and gasoil supplies following prolonged disruptions in the Middle East and Russia. According to the agency, global diesel exports were approximately 700,000 barrels per day lower in September than a year earlier. Combined net exports from Russia and the Middle East fell by approximately 1.3 million barrels per day, with increased shipments from other regions unable to replace the missing supply completely.
Those disruptions matter because diesel plays an essential role in commercial transportation, agriculture and industrial operations. When supplies become constrained, buyers continue competing for fuel even at elevated prices. The International Energy Agency reported that global diesel benchmarks remained extremely expensive relative to crude oil, reflecting an unusually tight market for refined products. Although international prices do not translate directly into identical movements at every Canadian fuel station, they strongly influence North American wholesale markets. Toronto’s widening gasoline-diesel gap therefore reflects a broader supply challenge rather than evidence of an isolated local shortage.
Refineries Cannot Simply Switch All Production From Gasoline to Diesel
Gasoline and diesel come from petroleum refineries, but producing more of one fuel is not as simple as turning a valve. Refineries process crude oil into multiple products, including gasoline, diesel, jet fuel and other petroleum derivatives. Their output depends on crude oil characteristics, equipment configuration, operating conditions and available processing capacity. Natural Resources Canada explains that refineries have limited flexibility to change their gasoline-to-distillate production ratios. At a certain point, increasing diesel production may also require producing additional gasoline.
Seasonal demand adds another complication. The U.S. Energy Information Administration notes that gasoline demand typically weakens after the summer driving season, while demand for distillates tends to increase during autumn agricultural activity and winter heating. Diesel and heating oil belong to the broader family of middle-distillate fuels, placing additional seasonal pressure on related markets. Ontario’s wholesale figures illustrate how the difference can emerge before fuel reaches a retail station. On September 23, Toronto wholesale diesel was listed at 209.2 cents per litre, compared with 140.7 cents for gasoline. That 68.5-cent wholesale gap helps demonstrate why a widening retail difference cannot be explained by station markups alone.
The 84-Cent Difference Quickly Adds Up for Drivers and Businesses
The size of Toronto’s gasoline-diesel gap becomes clearer when translated into ordinary fuel purchases. Using the initial October 15 forecasts, a 50-litre purchase of regular gasoline would cost $89.45, while the same volume of diesel would cost $131.45. That is a difference of $42 for an equal quantity of fuel. At 80 litres, the respective costs rise to $143.12 and $210.32, creating a difference of $67.20. A 100-litre purchase would show an $84 price difference.
These calculations illustrate the price spread, not a realistic choice between two interchangeable fuels. A vehicle designed for diesel cannot simply switch to regular gasoline, and diesel engines often consume fewer litres over a comparable distance. Natural Resources Canada confirms that diesel powertrains generally offer higher efficiency than their gasoline counterparts. The meaningful comparison between vehicles therefore involves fuel consumption per 100 kilometres, not just price per litre. Nevertheless, diesel owners must purchase the fuel their engines require, regardless of market conditions. For commercial operators purchasing hundreds or thousands of litres weekly, sustained high prices can create substantial financial pressure.
Trucking Companies Face Immediate Costs That Can Reach Consumers Later
Few industries experience rising diesel prices as directly as commercial trucking. Trucks transport groceries, building materials, factory components and retail products across Canada, often travelling thousands of kilometres in a single week. The Canada Truck Operators Association warned in September that high diesel prices were placing growing pressure on smaller carriers and owner-operators. At the time, Canada’s volume-weighted average retail diesel price had reached approximately $2.49 per litre, according to Kalibrate Canada figures cited by the association.
The challenge involves more than the amount displayed at the pump. Trucking companies must purchase fuel immediately, while payments from customers and adjustments through fuel surcharges can arrive considerably later. Small operators may lack the financial reserves needed to absorb prolonged price increases. In an October 9 commentary, the Ontario Trucking Association also warned that extreme financial pressure was encouraging unsafe cost-cutting among some noncompliant carriers. It called for stronger regulatory enforcement rather than allowing financial distress to undermine vehicle maintenance and safety obligations. Higher diesel prices do not automatically produce higher grocery bills overnight, but sustained increases can gradually influence shipping charges and the prices businesses charge customers.
Agriculture, Construction and Delivery Services Are Also Exposed
The effects of diesel inflation extend well beyond long-haul trucking. Agricultural equipment, construction machinery, delivery vehicles and many specialized commercial fleets depend on diesel or related distillate fuels. Farmers may face higher costs when harvesting crops or transporting products to processing facilities. Contractors using diesel-powered equipment can experience increased operating expenses, while businesses moving goods between warehouses and retailers face higher transportation costs. These pressures are especially difficult when contracts were negotiated before fuel expenses increased.
Refrigerated freight provides a useful example of how diesel costs can affect more than the truck itself. Temperature-controlled shipments may require additional fuel to operate refrigeration equipment, increasing exposure to price volatility. The Canada Truck Operators Association has specifically identified refrigerated transportation as an area facing additional costs. However, it also emphasizes that price increases do not necessarily pass directly to consumers. Some carriers absorb the expense, while others renegotiate freight rates or apply surcharges over time. The eventual effect depends on competition, contracts and how long elevated prices persist. This helps explain why gasoline relief for individual commuters can coexist with continuing inflation pressure across the goods transportation system.
Ontario’s Fuel Tax Cuts Have Not Prevented the Diesel Premium
Government fuel taxes remain part of the price paid at Ontario stations, but they do not explain most of the gap between gasoline and diesel. Ontario permanently reduced its provincial gasoline and clear-diesel fuel tax rates to nine cents per litre beginning July 1, 2025. The earlier rates had been 14.7 cents for gasoline and 14.3 cents for diesel. Both fuels are also subject to Ontario’s 13% harmonized sales tax. With identical provincial per-litre fuel tax rates, the much larger difference in retail prices primarily reflects other market factors, particularly wholesale fuel costs.
Federal policy has also changed. Canada eliminated its consumer-facing federal carbon fuel charge effective April 1, 2025. Ottawa subsequently suspended federal fuel excise taxes beginning April 20, 2026, originally through September 7. The government later announced plans to extend that suspension through January 2027, introducing Bill C-38 to implement the extension. As of October 15, parliamentary records still listed that legislation at report stage. These measures show how policymakers have attempted to reduce fuel expenses, but tax relief alone cannot overcome unusually high international diesel prices. Even when applicable taxes fall, supply disruptions and refinery costs can keep retail prices elevated.
International Oil Disruptions Could Keep Diesel Expensive Through Winter
The outlook for diesel remains uncertain because global supply problems extend beyond a single refinery or shipping route. The International Energy Agency reports that refinery disruptions in the Middle East, reduced Russian fuel exports and high transportation costs have limited the availability of refined products. Global gasoil production during the third quarter was estimated to be approximately 1.7 million barrels per day below the previous year’s level. The agency also expects refinery activity to reach a seasonal low in October before increasing toward year-end.
However, a recovery in refinery output does not guarantee immediate relief at Canadian fuel stations. Diesel inventories have already been depleted, and additional production may first be needed to rebuild reserves. Shipping costs create another obstacle, particularly when tankers must travel longer routes or avoid areas affected by conflict. Reuters reported in October that sharply higher tanker rates were disrupting international oil trade and creating unusual price differences between regions. The IEA expects diesel markets to remain constrained well into 2027, although that forecast depends on the recovery of supply and the evolution of geopolitical conditions. The message for Canadian businesses is that diesel costs may remain volatile even if gasoline becomes somewhat cheaper.
October 16 Forecasts Offer Little Immediate Relief for Diesel Users
The next available Toronto forecast suggests the gasoline-diesel divide could remain substantial. Canadians for Affordable Energy’s updated figures for Friday, October 16, place regular gasoline at 179.9 cents per litre and diesel at 264.9 cents. If those forecasts materialize, diesel would remain approximately 85 cents more expensive per litre than regular gasoline. Both prices would be one cent higher than the organization’s revised October 15 estimates. As recent changes demonstrate, however, predictions can be revised as wholesale markets and local station prices move.
Drivers attempting to control expenses can compare nearby station prices, avoid unnecessary trips and pay attention to fuel consumption rather than relying entirely on day-to-day pump movements. Natural Resources Canada recommends gentle acceleration, steady speeds, reduced unnecessary idling and properly inflated tires. It estimates that efficient driving techniques can lower fuel consumption by as much as 25% under suitable conditions. For trucking companies, route planning, fuel management and workable surcharge arrangements may also help reduce exposure. Ultimately, Toronto’s widening fuel-price divide illustrates two different economic realities: households may welcome cheaper gasoline, while the businesses transporting their food, equipment and everyday purchases continue facing exceptionally expensive diesel.
