How Worried Should You Be? Petrol in a Diesel Car in Edwinstowe
Less than you probably are, provided it hasn't been started. Petrol sitting in a diesel tank does nothing to the motor till something pulls it through the fuel system — the ignition priming the pump, the starter, or the drive itself. So the fair answer to the first question anyone around Edwinstowe asks, "have I ruined it?", is normally no. To keep it that way, ring Petrol in Diesel and leave the engine switched off. Keep reading for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and the way to make sure you never repeat it.
The engine and petrol in a diesel: what goes on
On its way through an engine, diesel has two jobs. It ignites, and before it ignites it lubricates. What stops the surfaces inside the high-pressure pump and your injectors from wearing against each other is your diesel flowing through them — they're built to extremely fine tolerances.
Petrol handles the first job poorly and the second not at all. It's runnier than diesel and removes the protection the system depends on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the clattering comes from.
Combined, those leave the shape of the issue clear. It's movement that does the harm, not contact. All a tank with petrol in it amounts to is a fuel issue. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the injectors further on.
How bad is petrol in a diesel? Four scenarios our technicians see in Edwinstowe
The best case there is: filled up, never started. The petrol is in the tank and only your tank, and the task is a drain and a flush where the car sits. This is the one scenario that can only truly occur at a forecourt, because anywhere else the vehicle has been driven to get there.
A brief spell of running, or merely the ignition on. Once primed, the system has pulled petrol from the tank as far as your filter and the fuel lines. Usually nothing more than draining, cleaning and sorting the fuel filter, and so still easy.
Driven a few miles. Now the pump has spent these miles running on thinned fuel. The work is your tank, the fuel lines, the filter and fresh fuel through the whole circuit, and how hard the car was driven counts as much as how far. Driving the children to St Mary's Church of England Primary School, Edwinstowe is one kind of trip. Any distance on the M1, under 15 miles from Edwinstowe, means the motor working hard throughout, and a run to Nottingham, under 25 miles away, is a very different task too.
Driven till it protested. Clattering, a lumpy idle, smoke, a throttle that has gone soft. That is your engine telling you its fuel has stopped acting like diesel. Stop wherever you are — the verge on High Street, a lay-by, a side street — and leave it where it is. A car pulled over early very rarely has long-term damage, since the drain and the flush-through, which still come first, deal with it.
Petrol in a diesel myths Edwinstowe drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." A bigger tank of the same mix is all you get, because topping up takes out nothing. The idea behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Lubrication matters more on newer diesels, not less, because their fuel runs through more precise components at higher pressure.
This is the one that catches drivers. Myth: "If it starts and drives, there is no harm done." The driver of a petrol engine fed diesel normally has no choice but to stop, since it will not run, and the damage stops with them. Feed petrol to a diesel and it normally fires up, idles and pulls away like nothing happened — all while its pump wears. Running isn't the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a separate fault. It doesn't put back what petrol has diluted, and that petrol is still inside your tank afterwards.
The next start draws petrol back round the pump from the fuel lines and the filter, where some of that sits once the motor has run. That's why draining your tank yourself does not sort it — a myth. And, a can of petrol drained by the kerbside is genuinely dangerous.
How does petrol in a diesel happen?
A careless moment is rarely the cause, and nobody means to do it. One way only, since of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol vehicle. That's how the forecourt makes it straightforward.
It happens when habit and your car stop matching. A new motor, a hire car or a courtesy car. Two motors on one drive, one petrol, one diesel. The pumps in a different order on a well-known forecourt. Filling up in a hurry on the way to Shirebrook, with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver accustomed to petrol: exactly when it occurs. Your hand does what it has always done when you add rain, a phone call or a back seat full of children.
Avoiding petrol in a diesel next time you fill up around Edwinstowe
- Check the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what matters.
- In a vehicle you don't know, look inside the flap over the filler or at the cap before your first fill: many cars state the fuel there.
- Label the key. In a home with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- "Diesel", out loud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds silly. It works.
- Put the phone away. This is an easy mistake to make while you are thinking about something else.
- Add-on devices are available for cars without one, and some diesels come with a filler that will not accept a petrol nozzle. Useful — but a safety net only, never a reason to stop checking the label.
- As soon as you realise, stop: less petrol inside your tank makes a weaker blend. What to do next does not change, though — still do not start the vehicle.
Petrol already in a diesel in Edwinstowe? Begin here
Then, there is only a short order of things. Starting it is out, and so is turning on the ignition. The staff on the forecourt — whether at Shell itself or wherever you filled up — will usually help roll it clear of the pump if you ask. Then ring 0333 366 0103 and tell us what was put in, about how much, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate problem — Edwinstowe has a page just for it.
What makes one Edwinstowe petrol in a diesel job cost more than the next
There is no honest single quote for this, since the four scenarios above are four different jobs. Mostly, the cost moves with which situation you're in. Where your car is matters too, and whether our van can safely reach it, after the ratio of petrol to what the tank holds.
That's why we ask three questions before quoting instead of after: what went in, how much, and if it has run. The replies change a range into a straight figure.
About Edwinstowe itself
Edwinstowe is a village in Nottinghamshire, situated on the banks of the River Maun at an elevation of around 65 metres. Edwinstowe lies near the towns of Rufford and Ollerton, and is approximately 16.9 miles from Nottingham. Edwinstowe has a population of around 1740 people, predominantly living in semi-detached housing. Edwinstowe is located in a rural area, with nearby Kings Clipstone also being a notable settlement.
Fuel drain cover across Nottinghamshire, Edwinstowe included
Petrol in diesel call-outs around Edwinstowe — part of the NG postcode area — go to vans that likewise cover the places around it, Rufford, Ollerton and Kings Clipstone included. The vehicle does not need to move to us: our technicians drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Edwinstowe: still at the petrol pump?
In that case, you couldn't be in a better spot. Switched off it remains; then phone.