Put Petrol in a Diesel Car in Horsey Down? Don't Start It
Don't start the engine. If the fuel is still inside your tank and the motor has not yet been started, a fuel drain is almost always all it requires — and that is determined in the next few minutes, not by how much was put in. Petrol in Diesel drains and flushes wrong-fuelled vehicles where they sit, across Horsey Down and the remainder of Wiltshire, on the forecourt, by the roadside or on a driveway. Our technicians can show you what your next move will be. Call us — this comes ahead of anything else.
What to try now about petrol in a diesel
- Don't start the car — and do not rely on it when it starts. This is the thing motorists get wrong about petrol in a diesel in particular. A petrol motor filled with diesel usually just can't run, so the person stops and the harm ends with them. A diesel filled with petrol usually starts, idles and pulls away quite happily for a couple of miles. It's not okay. It is grinding that fuel system as you drive.
- Diesel combusts, and before it ignites it protects — that high-pressure pump, those injectors. Petrol manages only the burning. So leave the ignition be too: turning it on is commonly enough to prime the system, and priming pulls petrol from the tank into exactly those components.
- That guidance supposes a diesel fuel system handles petrol by percentage. It won't. Tip diesel on top and nothing at all is removed; what you end with is a bigger tank of the same mixture. And no, the grade makes no difference — super unleaded is still petrol.
- Stay put if it is safe to. Hazards on, motor off, leave it. Wherever you have stopped — the verge on Bishopsfield, anywhere — an odd location for us beats a started diesel, and nothing is quicker for us to handle than a car that never shifted.
- Know where you are before calling. A postcode that starts SN6 6, and the name of whatever is next to you. Otherwise the van circles rather than arriving.
- Three answers decide your whole job: the fuel you put in, the ballpark amount involved, and if it has been turning since. The line is 0333 366 0103.
The high-pressure fuel pump spent that morning drive working on a fluid that had shed a lot of the protection it is designed around. Diesel protects that pump, and the injectors with it, before any of the fuel burns; petrol does the burning and none of the lubricating. So take a diesel Volkswagen Passat, fuelled at quarter past eight, driven in to work, and left sitting outside Swindon until you realise around eleven. Three hours of standing have altered nothing about it. The few miles before that altered a good deal, which is why the thing our engineers put to you is about mileage rather than time. Ring us. Keep the vehicle right where it is.
Someone will urge you to move it out of that gateway and fix it later. Please don't. A misfuelled diesel BMW 3 Series on the zig-zags outside St Sampson's Church of England Primary School is a hassle; the same motor started three more times to be polite is a fuel system rather than a tank. Every restart primes the fuel lines and draws more petrol through the filter then into your pump. Stay put, let everyone moan, then phone us.
Off the forecourt, receipt read, a couple of hundred yards, parked by Cricklade Bowls Club. For a diesel Audi A6 whose engine has turned, that's about the best version there is. Phone us, and let the car stand with the ignition alone. Short helps, genuinely — but a start is a start and a drive is a drive, and your filter has had thinned fuel through it, and so has your pump. Which is why the lines get cleaned and not just your tank drained.
Most of these happen somewhere new, and the cause is mechanical not slapdash — almost no resistance meets a smaller petrol nozzle entering a modern diesel filler neck. Two days into a diesel Peugeot 208, a fill-up by Cricklade Leisure Centre that you did not think about? Call us from where you are. Courtesy and hire cars go further before anyone spots it, and the further they go, the more petrol winds up at the injectors.
What takes place next is the issue. The motor immediately sucks the petrol left sitting in the fuel filter and the feed lines back round through the pump a second time, since draining a tank does nothing about fuel that has already left it. Drain it then put clean diesel in, a person certain will tell you — and that advice is half right, as do it to a diesel Seat Leon parked up, St. Sampson say, and the thing starts, which is what makes it sound sensible. Phone us instead. Our technicians flush the system and take the fuel filter off where the vehicle has a working one, and that is the difference between your car being fixed and your car simply starting.
Pump-side draining for petrol in a diesel
Much of this work begins at a pump, which means a large share of that is completed at one. The drain generally gets done on the spot. Still on the forecourt at Esso? Given the station's permission, that's somewhere our technicians work, and often.
At a garage, this gets stopped with your engine never fired, and nowhere else manages it. Fuel pulled out of that tank and through the filter, right to the high-pressure pump, is what happens when the motor is fired up and your car is driven to where it is now: the car park, the drive or the lay-by, anywhere other than the forecourt. So the flush covers the filter and the lines as well as the tank. That's still not a catastrophe, and our engineers sort it out where the vehicle stands. What determines it is whether the ignition was reached for in the seconds after the till receipt was checked.
Staff will usually chip in pushing it out from the pump, which lets the next motorist get through. Take the assistance. Starting the car just to shift four car lengths is not.
Coverage near Horsey Down
Horsey Down is a small village, and our technicians get out to it and to anywhere around it on the same trips: Cricklade, Chelworth Upper Green, Chelworth Lower Green, Hailstone Hill and Calcutt.
If yours is not on that list it does not mean we do not come — there are dedicated pages for nearly all towns around Wiltshire, and the ones named above are just the closest neighbours. Ring us and check rather than assuming, especially when you are on a boundary or somewhere the satnav misreads.
The area this page covers sits on our map. We operate at the roadside, on forecourts, on driveways and at car parks across all of that, and the vehicle never needs to move to us.
Horsey Down: stranded wherever you pulled up
Some drivers get no suitable spot to stop whatsoever. Hazards going in a lay-by somewhere, or pulled onto the verge beside B4040 because you worked it out after setting off — our engineers take that call often enough that it is the ordinary kind.
Okay where you are? Wait beside it. Not fine? Climb out and clear of it. Never fire it up to get to a better place. It will go — a diesel on petrol generally obliges — and each mile of obliging drags the blend deeper into the system. Pressing on causes the vehicle far more harm than our van heading out to an inconvenient place, and that's no trouble for us.
Some miles on petrol in a diesel: now what?
This is where the M4 counts, under 10 miles out of Horsey Down. A wrongly fuelled diesel will often get you onto it and some distance along before anything seems wrong, while the symptoms when they arrive are typically a loss of power, a lumpy idle and some smoke rather than a clean stop.
The next sensible junction is the one to take. Turn off there, then leave the restarting alone. On a longer drive — anything approaching the under 25 miles to the nearest city — take it the contamination has been through the filter, your pump and your injectors, and tell us when you phone. It alters what our engineers bring.
Horsey Down itself
Horsey Down is a locality situated on the riverside in Wiltshire, with an elevation of 87 metres above sea level. Horsey Down lies near the towns of Cricklade and Gloucester, and is characterized by its predominantly detached housing stock. Horsey Down is located in the South West region of England, approximately 75 miles from London. Horsey Down is also close to the smaller settlements of Chelworth Upper Green and Chelworth Lower Green.
When our technicians get to you in Horsey Down: what happens
- The answers alter the work, which is why we ask before quoting: what went in, how much of that, and if your engine has run.
- Away goes the polluted mixture.
- Lines purged, filter cleared. Whatever remains later isn't the thing that created the trouble.
- Our technicians pour clean diesel in and bleed your system.
- Our technicians start the engine and check it runs smoothly on clean diesel.
Then it is ready to set off. All of it is done where the vehicle is, so it never needs to go to a garage, and when it has been spotted soon, long-term damage is very rare.
Horsey Down AdBlue removal is a separate problem
Never crank it: that opening rule applies whether what was put in was AdBlue or petrol. What differs is this fault itself. Weakened diesel, and no protection left for the system that depends on it. That is petrol. Urea dissolved in water, AdBlue, and in a diesel tank that leads to rust and deposits.
Both are ours. There is a separate Horsey Down page for AdBlue removal, with the full story on it — including the reasons it frequently turns out to be the worse of the two.
How much is a petrol-in-diesel fuel drain around Horsey Down?
Truthfully, no single price fits on a page like this. This job varies. Here is what moves it:
- Started? Driven? Either answer matters more than anything else on this list.
- How much of the wrong fuel went in, against how much your tank holds.
- Whether it is unleaded or AdBlue.
- Where is it? And can our van get to it and work there sensibly?
A straight answer rather than a range is what you get for telling us three things: your vehicle, the amount, and whether it has run. Not pressing, with the car at home and going nowhere? Then is fine.
Petrol in diesel: common questions in Horsey Down
Can you do a fuel drain at a petrol station around Horsey Down?
Yes — forecourts are where a fair share of this gets done. We work at BP and the other forecourts around town all the time, with the site's permission — tell us which one you are at when you call and we will tell you whether our engineers can work there.
Is there a safe quantity of petrol in a diesel?
Whether your engine has run counts much more, though the ratio matters too, rather than the litres. What decides how much work is needed is whether that blend has been drawn through the fuel system — since though five litres in an almost empty tank is a separate case from five in a full one, either way that's the query.
I put petrol in my diesel and drove it. What now?
Stop safely. Off. Nothing after that. Driving moves the trouble along — out of the tank, into your pump and injectors. Motorists fear it a good deal more than the recovery rate warrants, mind. The one truly valuable thing left to you isn't restarting it.
Fuel drains and manufacturer warranties
A drain and flush carried out correctly isn't a modification and does not void a manufacturer's warranty. Another reason to leave it switched off: running a diesel on petrol is the thing more likely to cause a dispute with one.
Two-stroke oil in that tank, and then home?
No. It belongs to a different fault from a separate era, and petrol has diluted something no oil of that kind puts back. Your pump still has to put up with it, because your tank still has petrol in it later on.
Do I need a main dealer for petrol in a diesel?
There is no need to bring it to a main dealer, since our technicians drain and clean the car wherever it is.
Is the vehicle still with you?
Never turn the engine back on.
Already driven it? Then pull over somewhere safe, turn off, then let the vehicle stay that way. A still, cold car is the best place to be in, and this is recoverable from a lot more regularly than drivers assume.
Throughout Wiltshire and in Horsey Down: mobile fuel draining, at home or on the forecourt or at the roadside.