Putting the wrong fuel in your vehicle is more common than most drivers expect, and the consequences depend almost entirely on what you do in the next few minutes. If you catch it before starting the engine, a full recovery is almost always possible. If you drive on contaminated fuel, the damage can reach into the thousands of dollars. Gloucester Towing responds to wrong-fuel calls across the Ottawa-Gatineau area and drains your tank on site so you can get back on the road without the repair bill.
The two most common scenarios are diesel in a petrol vehicle and petrol in a diesel vehicle. Both are handled differently, and both require professional drainage rather than simply trying to dilute the wrong fuel by adding more of the right type. Fuel drainage falls under our car maintenance service in Ottawa. Our technicians carry the equipment needed to extract the contaminated fuel safely, flush the system, and refill with the correct product on the spot.
Situations that lead to wrong-fuel calls in Ottawa
Filled at a busy station and grabbed the wrong nozzle in a hurry
Borrowed or rented a vehicle and was not sure which fuel it takes
Picked up a new vehicle type and defaulted to old habits at the pump
Fuel cap label was missing or worn and the type was not obvious
Why the Engine Must Not Start
The moment you turn the key or push the start button, the fuel system begins circulating whatever is in the tank. In a petrol engine, diesel coats the fuel injectors and spark plugs, causing misfires and contamination throughout the system. In a diesel engine, petrol strips the lubrication from the fuel pump and high-pressure injection components, which can fail within minutes of running. The longer the engine runs on wrong fuel, the more components are exposed and the higher the repair cost.
If you realize the mistake before starting the engine, do not touch the ignition. Call us immediately. We will walk you through what to do while we are in transit, including whether to leave the car in neutral and how to secure it safely in the station or on the roadside.
Do not start the engine
Even a brief crank to "see if it runs" is enough to circulate contaminated fuel through the injectors and fuel lines. There is no way to undo that circulation once it happens. Step away from the ignition the moment you realize the mistake and call for drainage. The difference between catching it before and after starting is often the difference between a service call and a fuel system overhaul.
How Fuel Drainage Works
From wrong fuel to cleared tank
Call (613) 662-6262 the moment you realize the mistake. Do not start the engine. Give us your location and the fuel type you accidentally used.
Our technician arrives with drainage equipment and confirms the contamination details before beginning the extraction process.
We drain the contaminated fuel from the tank, flush the fuel lines, and remove as much of the wrong product as safely possible on site.
We refill the tank with the correct fuel type, confirm the engine starts cleanly, and check for any warning lights before clearing you to drive.
Wrong Fuel Drainage Across the Ottawa-Gatineau Area
We respond to fuel drainage calls throughout the Ottawa-Gatineau area, including highway stations, parking lots, residential driveways, and roadside locations. Wrong-fuel calls at gas stations are the most common, and in those situations we coordinate with the station so you are not blocking the pumps while we work.
If you have already left the station and the car has stalled or is running rough, stay where you are and call us. We will tow if needed after the drainage is complete or arrange towing and drainage as a combined call.
Diesel in a petrol engine coats the spark plugs and fuel injectors with an oily residue that causes misfires and combustion problems. If caught before starting, a full drainage clears the system with no lasting damage. If the engine ran on the wrong fuel, the injectors and plugs may need cleaning or replacement depending on how long it ran. The sooner you call, the better the outcome.
Call immediately, ideally before you leave the pump. The longer the wrong fuel sits in the tank or circulates through the system, the more components it can affect. If you caught it at the station, there is no urgency to rush anywhere. Just stay with the vehicle, do not touch the ignition, and wait for us to arrive.
It depends on the ratio. A small splash of wrong fuel in a full or near-full tank of the correct type may dilute enough to drive with, but this calculation depends on the vehicle, the engine type, and how much wrong fuel was added. We assess this on arrival. If the ratio is safe to drive, we will tell you. If it is not, we drain the full tank rather than risk engine damage from an educated guess.
Most drainage jobs take 30 to 60 minutes on site depending on tank size, how much wrong fuel was added, and whether any flushing is needed beyond the tank itself. We carry the equipment to complete the job roadside without needing to tow the vehicle to a shop in most cases. You will know the estimated time once our technician assesses the situation on arrival.
If the engine never started, the answer is almost always no. The fuel system is self-contained until the key is turned, so a pre-start drainage typically leaves no lasting damage. If the engine ran briefly before you caught the mistake, the outcome depends on how long it ran and which fuel types were involved. Our technician will check for fault codes and warning lights after the drainage and advise you on next steps if anything looks off.
Yes, and you should call as soon as the vehicle stops running rather than trying to keep driving. Continued driving on wrong fuel causes progressive damage to the fuel pump and injectors. Once the vehicle is stationary, we drain what remains in the tank and assess the condition of the fuel system. In some cases a tow to a shop for additional flushing is the right next step, and we can arrange that as part of the same call.
Wrong fuel in the tank? Do not start it, call now.
