WTI crude oil, diesel rack and pump prices: what a fleet should compare

Start by naming the price

A search for oil price can lead to a crude benchmark, a futures contract, a market-indicator display or a dated spot observation. None is automatically the price a truck will pay for diesel. Before using a number, write down its product, location, currency, unit and date.

On Diesel Cost Watch, the published WTI series is the EIA’s Cushing spot price in USD per barrel. The Toronto rack series is Petro-Canada ULS Diesel in CAD per litre, excluding taxes. Ontario regional figures are retail survey averages. Each has a different purpose: market context, a terminal benchmark or a regional comparison.

Rack price versus pump price

Petro-Canada’s public rack posting is for pickup at the listed terminal and excludes taxes. Its source table uses Canadian cents per litre. Divide by 100 to express that number in dollars per litre. The effective date identifies the posting being quoted; it is separate from the time you opened the page.

A pump price and a terminal posting do not describe the same transaction. Check the supplier quote for transport, fees, taxes, discounts, volume conditions and payment terms before comparing. A difference between retail and rack is not proof of a station’s profit.

For a delivered quote, keep the terminal, product and pricing period with the supplier’s actual terms. A weekly-average benchmark should not silently be replaced by one daily posting. Save the quote or invoice reference so a later comparison can be reproduced.

Why diesel does not follow crude one for one

The EIA identifies crude costs, refining, distribution and marketing, and taxes as components of retail diesel prices. Diesel supply, seasonal demand and regional conditions can change separately from crude. For a Canadian comparison, USD crude and CAD diesel also need a consistent currency basis.

That is why a lower WTI reading alone cannot establish tomorrow’s Toronto rack price or the price at your next stop. A correlation describes how series moved in the sample you studied. A useful buying signal would also have to work on later observations that were not used to choose the model.

Truck University’s timing indicator remains neutral until there is enough public history and a convincing test against simply assuming no change. A chart that looks similar is a research starting point, not a reason to change a dispatch plan.

Turn a price change into a trip-cost change

Use your own consumption and supplier quote in the trip fuel-cost calculator. Then use the fuel-stop comparison for detours, fees and time. Do not substitute the rack posting for your payable price unless your agreement actually uses that basis.

Keep a record that answers the next question

• For market context: save the source, exact series or terminal/product, observation date and original currency/unit.
• For a purchase decision: save the actual quote, validity period, volume, fees and tax basis.
• For the fuel log: match litres and costs to a complete full-to-full interval for the same truck. Keep the receipts behind the entry.
• When reviewing a result: separate changes in unit price from changes in litres consumed. More spending can come from either.

A dashboard refresh does not make an old observation new. Check the date printed beside each value, especially around weekends, holidays or a delayed publication. If an update fails, use the retained date to decide whether that benchmark is still useful for the question you are asking.

Use market context alongside operating needs

This guide does not predict tomorrow’s price, determine taxes or guarantee fuel availability. Regional averages are not individual-station quotes. The live watch’s Ontario coverage is not a Canada-wide average. Keep sufficient fuel for the route and safe reserves; a possible price difference is only one part of a fuel-stop decision.