Construction sites in southwestern Ontario use on-site wheel-to-wheel refuelling and coloured (dyed) off-road diesel where eligibility holds.

Service: Coloured (dyed) diesel for off-road / farm / construction

Diesel fuel coloured red and chemically marked under the Ontario Fuel Tax Act, exempt from provincial fuel tax, and restricted to non-taxable uses such as agricultural equipment, unlicensed construction equipment, stationary engines, marine commercial use, and heating. Functionally identical to clear diesel, but visibly red.

In Ontario, the official statutory term is "coloured fuel" (Fuel Tax Act). Industry and customers also say "dyed diesel," "marked diesel," or "red diesel." Storage tanks and dispensers must carry the ministry's coloured-fuel labels. Mixing with clear fuel renders the entire batch unusable in licensed vehicles.

Service: On-site refuelling (wheel-to-wheel)

Direct-to-equipment fuelling — the supplier's truck dispenses diesel or DEF straight into vehicle and equipment fuel tanks at the customer's yard, farm, or job site rather than into a stationary storage tank. Often called "wet-hosing" or "wheel-to-wheel."

Itemized delivery slips listing fuel volumes by piece of equipment are standard. Construction and fleet customers save labour, paperwork, and equipment downtime when fuel comes to the equipment overnight rather than having operators chase the pump in the morning.