How Worried Should You Be? Petrol in a Diesel Car in Ddol
Likely less than you already are — as long as no one has started it. Till your ignition primes the pump, your starter cranks, or the car is driven, petrol in a diesel tank simply waits there and does no harm. Which means the honest reply to the first Ddol question — "have I ruined it?" — usually no. Leave the engine off and phone Petrol in Diesel — that keeps it like that. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has spread, and the way to make sure you never do it again.
The motor and petrol in a diesel: what goes on
Passing through an engine, diesel is doing two jobs at once. Lubricating comes before burning; it does both. Designed to extremely fine gaps, the fuel injectors and your pump depend on your diesel flowing through them to keep their surfaces from wearing against one another.
Of these two tasks, petrol manages the first poorly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump running on the blend to wear itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the knocking.
Taken together, they show what shape the problem has. Contact does not do the harm — circulation does. A tank with petrol in it is a fuel issue. Whatever a worn pump sheds travels on, carried by the fuel, into the injectors further along, which is why a pump that has worked on the petrol is where a mechanical issue starts.
How serious is petrol in a diesel? Four scenarios we see in Ddol
The best case there is: filled up, not once started. On a forecourt, and really only there, that petrol is still limited to your tank — because everywhere else the car was driven to get to it. The task is draining and cleaning on the spot.
Ignition on, or started for a second. Petrol has come out of that tank and got to the fuel filter and your lines, because your system has been bled. Usually nothing more than emptying, purging and seeing to your filter, so still straightforward.
The pump now worked a few miles on diluted fuel — that is what driving the vehicle meant. Distance is only half of that; how hard it was driven matters just as much. Either way the work runs to that tank, the lines, the fuel filter and clean fuel through the entire circuit. Driving the kids to the local primary school is one kind of trip. Very different a second time: a run to Wrexham, under 3 miles away, or any distance on the M53, under 15 miles from Ddol, where the engine never stopped labouring hard.
Driven on till it complained — clattering, smoke, an uneven idle, a soft throttle. The fuel is not behaving like diesel any more, and your motor is telling you. Leave it where it stops: a lay-by, a quiet street, the verge on Bersham Road. Permanent damage is very unusual when a car is pulled over quickly, and the fuel drain and flush that still come first sort it out.
Petrol in a diesel stories Ddol motorists hear
False: topping up to full with diesel makes it fine. It doesn't. A fuller tank of the same mix is all it gives, since topping up takes out nothing. A diesel fuel system does not tolerate petrol by percentage in the way that advice supposes.
"Current diesels can handle a little petrol" — a myth, and closer to the opposite. At higher pressure, through smaller parts: that's how a modern diesel handles its fuel, and so the protection counts for more, not less.
The myth that catches people off guard: if it starts and drives, it must be unharmed. Any petrol motor fed diesel normally will not run, and so the motorist stops and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile your pump wears. Fine and running aren't the same at all.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an outdated workaround for a separate issue. That petrol is still inside your tank afterwards, and what it has diluted is not put back.
"Drain it yourself and you are sorted" — a myth, since after it's been running some petrol sits in the filter and lines, waiting to go straight back through your pump on your next start. Clearing petrol into a can by the kerbside is also really risky.
How does petrol in a diesel occur?
It is seldom carelessness, and nobody does it on purpose. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly will not fit a petrol car. That is how the forecourt makes it simple.
It takes place when habit and the car stop matching. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the driveway. The pumps in a different order on a well-known forecourt. Rushing for a train at Wrexham General and fuelling up en route. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is exactly the moment it happens. Add rain, a phone call or a back seat full of kids, and the hand does what it has always done.
Next time you fill up in Ddol: avoiding petrol in a diesel
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Check the petrol pump's label; the colour is just a clue.
- Check your filler flap. Plenty of cars state the fuel type inside the flap or on the cap. Look at it on the first fill in any car you do not know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, in a household with one of each.
- "Diesel", out loud, before you pick up the nozzle — every time a new or hired car needs its first tank. It sounds silly. It does the trick.
- Whilst you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Add-on devices exist for motors without one, and some diesels come with a filler that won't accept a petrol nozzle. Useful — but a safety net at best, never a reason to stop checking the label.
- Less petrol means a thinner mixture, so stop the moment you realise — though remembering that your next step is unchanged. It's still not to fire it up.
Already put petrol in a diesel around Ddol?
In that case, there's only a short order of things. Leave it unstarted, with the ignition switched off as well. The attendants at the forecourt — whether at Esso itself or wherever you filled up — will normally help push it away from the petrol pump if you ask. Next, 0333 366 0103. We'll ask what went in, roughly how much, and if it's been run.
If it was AdBlue instead of petrol, say so. That's a different problem — corrosion and deposits and not lost lubrication — and it has its own page for Ddol.
Ddol petrol in a diesel tasks: why one costs more than another
A fair single quote does not exist here: four situations, four separate tasks. Which of them you're in is mostly what moves the cost. After that it is the proportion — how much petrol went in against how much the tank takes — and after that where your car is and whether a technician can reach it safely.
That's why our engineers ask three questions before pricing instead of after: what went in, how much, and whether it's run. Those replies are what change a range into one firm number.
About Ddol and where it is
Ddol is a small village situated on the riverside in Wrexham county, with a population of around 1296 people. Ddol has a mix of housing types, but semi-detached homes are the most common, and it is located near other villages such as Bersham and Rhostyllen. Ddol sits at an elevation of 105 metres, close to the city of Wrexham, which is just 1.7 miles away. Ddol is part of a wider area that includes Pentre Bach and other local communities.
Fuel drain cover in Ddol and across Wrexham
Petrol in diesel calls in Ddol — part of the LL postcode area — go to vans that likewise cover the locations round it, Bersham, Rhostyllen and Pentre Bach among them. A forecourt, a supermarket car park, a lay-by or your own drive are all spots our technicians work, and your vehicle does not need to come to us.
Ddol: still at the pump?
In that case, you could not be in a better place. Phone, and leave it switched off.