Q– I’ve put diesel in a petrol car. What do I do now?
Whatever you do, do not turn on the ignition or start the car. It is much less common to put diesel in to a petrol car than to put petrol in to a diesel car, because the standard diesel nozzle at fuel stations is larger than the fuel filler neck on modern petrol cars – the simple fact that the filler neck won’t accommodate the diesel nozzle means you have to be pretty determined to mis-fuel your petrol car with diesel. If this should happen, call Highland Fuel Drain straight away and we will be there to assist you, normally within 1 hour.
Generally, a small amount of diesel in your car should not damage the engine, as long as you have not turned on the ignition or started it and you then make sure you top up fully with petrol.
If you’ve added more than 5% (2.5 litres in a 50 litre tank) diesel – we will need to fully drain the tank and refill the car with petrol. If you’ve added less than 5% diesel – You may not need to drain or flush the diesel fuel from the car and may be able to fill the fuel tank with petrol unless your manufacturer’s warranty (should you have one) says otherwise.
Q– I’ve put Petrol in my diesel car what is the potential damage?
Diesel engines have fuel pumps that work on very fine tolerances and are lubricated by the actual diesel fuel itself. Petrol in diesel fuel acts as a solvent – it dissolves the active lubrication in diesel which may cause damage to many internal components including the high pressure fuel pump through the sheer metal to metal contact.
Some advanced fuel system seals can be affected by the compounds in petrol too. As a rule of thumb the further the contaminated petrol goes in the diesel fuel system the more expensive the repair costs will be. Some manufacturers advise that seals and filters should be renewed even if the engine has not been run. This particular remedial action will not be nearly as expensive as having to replace the entire engine.
The HDi diesel engines, or common rail diesel systems, are particularly vulnerable – if petrol fuel works it way in to the high pressure fuel pump, the metal to metal wear creates debris, if this gets further in to system you may also have to replace the low and high-pressure fuel pumps, injectors, fuel rail, line filters and the fuel tank too. This shows what a nightmare can be created by the simple act of putting the wrong fuel in your car.
Many diesel engines use a low-pressure electric pump in the tank or sender unit and this begins to work as soon as the ignition is switched on, circulating the contaminated fuel through the pump and rail – so if you’ve put the wrong fuel in your car it’s important not even to turn the ignition on and the engine must certainly not be started.
INCORRECTLY FUELED VEHICLE DISCLAIMER.
DUE TO THE NATURE OF INCORRECTLY FUELING A VEHICLE, HIGHLAND FUEL DRAIN, REFUSE TO GIVE ANY GUARANTEE OR UPHOLD ANY LIABILITY CLAIM MADE WITH RESPECT TO ANY FUEL DRAIN UNDERTAKEN.
THE OWNER / DRIVER OR PERSON RESPONSIBLE FOR THE INCORRECTLY FUELED VEHICLE, MUST ACCEPT FULL LIABILITY FOR ANY DAMAGE CAUSED OR FOR FURTHER COSTS INCURRED DUE TO RE-FUELING WITH THE WRONG FUEL, REGARDLESS OF IF THE ENGINE HAS OR HAS NOT BEEN STARTED.
Once fuel draining is complete and all contaminated fuels have been removed, fresh fuel must be added to the tank. We will do our very best to get the vehicle re-started.
In the event engine damage HAS occurred and the engine will not start or it starts with obvious running issues.. Highland Fuel Drain will be unable to offer any further assistance! The vehicle will need to go into a garage to diagnose in-depth the damage that wrong fueling has caused.
It’s the responsibility of the Owner / Driver / Person in charge of the vehicle to pay our bill in full and arrange to have the vehicle removed.
If in the very unlikely event we are unable to drain / remove the contaminated fuel from your vehicle, We will NOT require any form of payment, as we have been unable to undertaken the task asked of us.