Petrol in a Diesel Car in Wymeswold: How Worried Should You Be?
Likely less than you are now — provided no one has started it. "Have I wrecked it?" is the first question everyone in Wymeswold asks, and the honest answer is generally no, since petrol resting in a diesel tank harms nothing until it's drawn through the fuel system — by ignition priming, by the starter, or by being driven. Leave your engine off and phone Petrol in Diesel — that is how you keep it that way. Further down, you will find what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you a second time.
What petrol in a diesel does to your engine
On its way through a motor, diesel has two tasks. Before it ignites, it lubricates — and then it burns. Your high-pressure pump and the fuel injectors are designed to very fine tolerances, and your diesel passing through them is what keeps those surfaces from wearing against each other.
The second job petrol does not do at all, and the first it does badly. It is runnier than diesel and strips away the protection the fuel system depends on, and so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That is where the rattling comes from.
The shape of the issue is clear when you put those together. The harm is done by movement, not by contact. Where that petrol is only in your tank, it is a fault of fuel, nothing more. Whatever a worn pump sheds travels on, carried by the fuel, into the injectors downstream, which is why a pump that has been working on the petrol is where a mechanical problem begins.
Petrol in a diesel in Wymeswold: how bad is it? Four situations
Fuelled, and never started: nothing beats it. Being on a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With the petrol held inside the tank alone, it's cleared and flushed right where it stands, and nothing more is needed.
Ignition on, or started for a moment. Petrol has come out of the tank and got to the filter and the fuel lines, since your system has been primed. Normally nothing more than draining, cleaning and seeing to the fuel filter, and so still easy.
Some miles driven, and the pump has spent every one of them labouring on weakened fuel. Tank, lines, filter, then fresh fuel put through the whole system: that is the work, and the way the vehicle was driven matters as much as the distance. The school run to Wymeswold Church of England Primary School is one thing. Any miles on the M1, under 10 miles from Wymeswold, means the engine has worked hard throughout, and a run to Nottingham, under 15 miles away, makes a very different job as well.
It protested, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. The engine is telling you your fuel is no longer behaving like diesel. Leave it where it has stopped: a lay-by, a side street, the verge on The Stockwell. The drain and flush still come first, and they take care of it: if a vehicle is pulled over soon, long-term damage is very rare.
Stories Wymeswold drivers hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Topping up takes out nothing; it gives you a bigger tank of the same mixture. Percentage isn't how a diesel fuel system tolerates petrol, however much that guidance presumes.
Not so: a modern diesel copes with a bit of petrol. Rather, the reverse. Protection counts more on current diesels, not less, since their fuel passes through smaller components at higher pressure.
Myth: "If it starts and drives, there is no harm done." This is the one that catches drivers. A petrol engine fed diesel normally will not run, and so the driver stops and the damage stops with them. Feed petrol to a diesel and it normally starts, ticks over and pulls away as if nothing has happened — all the while its pump wears. Being able to run isn't the same as being fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. It does not put back what petrol has thinned, and that petrol is still in that tank afterwards.
Once the motor has been run, part of that petrol sits in your filter and the lines, not your tank — and your next start sends it right back through the pump. So the myth "drain that tank yourself and you're sorted" does not hold. Draining petrol into a can at the roadside is also genuinely hazardous.
How does petrol in a diesel occur?
On purpose? Never. Through carelessness? Rarely, if ever. A diesel nozzle mostly won't fit a petrol car, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake straightforward, and just in that direction.
When routine and your car stop matching, it happens. Any vehicle that's new to you — a hire car, on loan as a courtesy car, or just bought. One petrol and one diesel on the drive of the same household. A forecourt you know, but with its pumps arranged differently. A hurried fill on the way to Loughborough with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist used to petrol: precisely when it occurs. The hand does what it has always done once you add rain, a phone call or a back seat full of children.
Wymeswold people: how to avoid petrol in a diesel next time
- Check the pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what counts.
- Inspect your filler flap. Plenty of cars state the fuel type inside the flap or on the cap. Look at it on your first fill in a motor you don't know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of meaning to remember, for a home with one of each.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It sounds daft and it works.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck your phone away then keep your mind on the pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to refuse a petrol nozzle, and add-on devices are available for motors without one. They are a backstop, not a reason to stop checking the pump.
- Less petrol means a weaker mix, so stop as soon as you realise — though remembering that your next step is unchanged. It is still not to fire it up.
Already put petrol in a diesel around Wymeswold?
Then the order of things is short. Leave it unstarted, with the ignition off too. Yet at the forecourt, at Murco or anywhere else? Ask the attendants to help you push the car away from the petrol pump. Then phone 0333 366 0103 and tell us what went in, about how much, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different issue — Wymeswold has a page just for it.
Why one petrol in a diesel job around Wymeswold costs more than another
There's no honest single quote for this, since the four scenarios above are four different jobs. What moves your cost is chiefly which of them you are in. Where the car is matters too, and whether a van can safely get to it, after the share of petrol to what that tank holds.
Before any quote, not after, we ask three queries: your fuel that went in, its quantity, and if it has run. That is why. A range becomes a straight figure once those answers are in.
About Wymeswold, for a moment
Wymeswold is a village in Leicestershire, situated near the River Wreake in the East Midlands region of England. Wymeswold sits at an elevation of 78 metres, with detached housing being the predominant type of accommodation. Wymeswold is located close to several nearby places, including Rempstone, Thorpe in the Glebe, and Burton on the Wolds, and is approximately 10.6 miles from Nottingham. Wymeswold has a population of around 921 residents.
Wymeswold and Leicestershire: where our fuel drain cover runs
Wymeswold waits in the LE postcode area, and the teams that answer petrol in diesel jobs there work the places around it as well — Rempstone, Thorpe in the Glebe and Burton on the Wolds among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots we drain, and your car does not need to move to us.
At the petrol pump around Wymeswold, still?
Then you're in the best place there is. Call, and keep it switched off.