How Worried Should You Be? Petrol in a Diesel Car in Orrell
Likely less than you are now — provided nobody has started it. Till your ignition primes your pump, the starter turns, or your vehicle is driven, petrol in a diesel tank just waits there and does nothing. Which means the honest reply to that first Orrell question — "have I ruined it?" — usually no. Petrol in Diesel is who to phone, with the motor kept off, and so it remains that way. What petrol really does to a diesel, how to gauge how far it has travelled, and how to stop it from happening again: that is the remainder of this page.
Inside your engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey through a motor. It burns, and before it burns it lubricates. Very fine gaps go into the injectors and the high-pressure fuel pump, and only the diesel flowing through keeps those surfaces from grinding together.
Petrol handles the first task poorly and the second not at all. Being less viscous than diesel, petrol strips away the protection a fuel system needs, leaving a pump on that mixture to wear itself. It's equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the rattling.
The shape of the trouble is clear once you put those together. It is movement that causes the damage, not contact. Petrol in the tank is a fuel problem. Once the pump has been running on that petrol, a mechanical issue has started: whatever is shed by a pump that is wearing down travels downstream to the fuel injectors with the fuel.
Orrell, petrol in a diesel: four situations, from mild to serious
Fuelled up, not once started. The best case there is. Being at a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With the petrol kept inside that tank alone, it is drained and rinsed on the spot, and nothing more is needed.
Your ignition turned on, or a brief start. With the system primed, your lines and filter now contain petrol that has come from the tank. Drain, flush, see to the fuel filter: still normally simple.
Driven a few miles. Now your pump has spent those miles running on weakened fuel. Tank, lines, filter, then fresh fuel put through the entire system: that's this work, and the way your car was driven counts as much as the distance. A school run to Orrell Holgate Academy is one thing. Very different again: a trip to Liverpool, under 15 miles away, or any mileage on the M58, under a mile from Orrell, where your engine never stopped working hard.
Driven till it protested. Knocking, a ragged idle, smoke, a throttle that has gone soft. The engine is telling you the fuel is no longer behaving like diesel. Whether it's the verge on Orrell Road, a lay-by or a side road, stop there and leave it. A car pulled over early very rarely has permanent damage, because the drain and the flush, which still go first, take care of it.
What Orrell people get told about petrol in a diesel — and the stories in it
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. A bigger tank of the same mixture is all you get, because topping up removes nothing. That advice supposes a diesel fuel system handles petrol by percentage. It does not.
Myth: a current diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through more precise components: that's how a current diesel handles its fuel, and so the protection matters for more, not less.
This is the one that catches people. Myth: "If it starts and drives, there is no harm done." Diesel in a petrol motor generally leaves a motor that will not run: the motorist stops, and so does the harm. A diesel fed petrol usually starts, idles and drives away as though nothing has happened, while the pump grinds. Being able to run is not the same as being fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It's an old fix for a different problem. What petrol has weakened remains thinned, and that petrol remains inside the tank anyway.
Myth: "Drain that tank yourself and you are sorted." After your engine has run, some of the petrol is no longer in the tank: it is in your filter and the fuel lines, and it goes straight back through the pump at your next start. And, a can of petrol filled by the kerbside is genuinely hazardous.
How petrol ends up: petrol in a diesel
It is seldom carelessness, and nobody does it on purpose. A diesel nozzle generally will not fit a petrol vehicle, yet the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and only in that direction.
When routine and the vehicle stop matching, it happens. A new motor, a hire car or a courtesy car. One petrol and one diesel on the driveway of the same household. The pumps in a different order on a familiar forecourt. Filling up in a rush en route to the nearest station, with a train to catch. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is exactly the moment it takes place. Throw in a back seat full of kids, a phone call or rain, and the hand takes over.
Avoiding petrol in a diesel next time you fill up in Orrell
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most usually do. Check the pump's label; the colour is just a hint.
- Inspect your filler flap. Many cars state the fuel type inside the flap or on the cap. Look at it on your first fill in any car you don't know.
- One of each in the home? Mark your key to your diesel — a coloured fob, a sticker — since meaning to remember is not enough.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It seems daft and it does the trick.
- Mistakes like this are straightforward to make whilst your mind is on something else, so the phone goes away.
- Some diesels have a filler built to refuse a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Stop as soon as you notice. Less petrol in that tank makes a weaker mix. It doesn't change what to do next, which is still not to fire it up.
Petrol already in a diesel in Orrell? Begin here
Then, there's only a short order of things. Do not turn your ignition on, and do not fire it up. Yet on the forecourt, at Esso or anywhere else? Ask the staff to help you push the vehicle clear of the petrol pump. What was put in, about how much, and if it has run: tell us those when you ring 0333 366 0103.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different issue — Orrell has a page all for it.
Why one petrol in a diesel task around Orrell costs more than another
The four scenarios above are four separate jobs, so no single price for this would be honest. The situation itself does most of the work of moving your cost. Beyond that it's the proportion — how much petrol was put in against how much your tank holds — and after that where the car is and whether a van can reach it safely.
That's why our technicians ask three queries before pricing instead of after: what got in, how much, and whether it has run. A range becomes a straight figure once those replies are in.
About Orrell, for a moment
Orrell is a locality in Greater Manchester, situated inland at an elevation of 91 metres, approximately 14 miles from Liverpool. Orrell has a population of around 3187 people, with semi-detached housing being the predominant type. Orrell is close to nearby places such as Orrell Post, Tontine, and The Bell, and is about 177 miles northwest of London.
Across Greater Manchester and in Orrell: fuel drain cover
The vans answering petrol in diesel calls in Orrell, in the WN postcode area, equally work the places near it, Orrell Post, Tontine and The Bell included. The vehicle does not need to move to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the petrol pump in Orrell, still?
Then, you could not be in a better position. Keep the car switched off, then ring.