Barbican: Put Petrol in a Diesel Car?
Never start the motor. While the fuel is still sitting in the tank and the engine has not run, a tank drain is almost always all it requires — and that's settled in the following few minutes, not by how much got in. Petrol in Diesel drains and cleans wrongly fuelled vehicles where they stand, across Barbican and the remainder of Greater London, on the forecourt, at the roadside or on a drive. Our team will explain what the following stage will be. Contact us — this goes ahead of everything else.
What now? Petrol in a diesel, in order
- Don't start the vehicle — and never rely on it if it starts. Here is the part motorists get wrong about petrol in a diesel especially. A petrol motor filled with diesel typically just will not run, so the motorist stops and the wear ends with them. A diesel fed petrol typically starts, ticks over and drives off without complaint for a few miles. It isn't okay. It's grinding the fuel system whenever you drive.
- Switching the car's ignition on usually primes the system, and priming is what draws petrol out of the tank and into your pump and injectors. Those are the parts diesel keeps protected on its way through, before it ignites. Petrol does the burning and none of the protecting. Leave the car's ignition off.
- That guidance presumes a diesel fuel system handles petrol by percentage. It won't. Pour diesel on top and nothing at all is taken out; what you end with is a fuller tank of the same blend. And no, the type makes no difference — super unleaded is just petrol.
- A motor that hasn't shifted is the easiest one to handle, so remain where you are if you safely can. Pulled up on the verge on Fore Street? Hazards on, then keep it there. A difficult place suits us better than a started motor.
- Before you ring, gather your position. Anything closest to you with a sign on it, plus a postcode starting EC2Y 8 — that is what determines whether the van shows up or circles.
- Call 0333 366 0103. Let us know what got in, approximately how many litres, and also if your car has run. These three details shape the entire call-out.
Forecourt drains for petrol in a diesel
Most of the job starts at the pump, meaning a fair chunk of it gets completed there. Our technicians work on petrol station forecourts all the time, with the site's consent, so if you're still at Shell that's typically where this drain happens.
At a garage, this is halted with your motor never started, and nowhere else manages it. The few seconds between checking your receipt and reaching for the key determine how much needs flushing. Everywhere other than a forecourt — a car park, a drive, a lay-by — your car was switched on and moved to get there, so fuel was drawn from the tank, through the filter and into the high-pressure fuel pump. That means your lines and the fuel filter require rinsing as well as that tank. It's not a catastrophe, and our technicians can still sort it out where the vehicle is.
Wheel the vehicle out of the way if the staff volunteer, and they generally will. The next customer gets by the pump, and that is worth doing. Cranking it just to roll four vehicle lengths isn't.
We are in car parks like the one at Geranium a lot, and it's hardly ever your fuel that complicates them. It is that bay. Vehicles both sides. Trolleys stacked up behind. Occasionally a height bar at the entrance, which determines whether a van can reach you at all. So mention how boxed in you are when you call, and which way the vehicle is facing. If there's no room to work next to the Peugeot 308, our engineers roll it without the motor. That isn't fuss over a couple of seconds: starts prime things, fuel comes out of that tank towards your pump, and a car shifted twice for a better space is silently a harder job than one no one touched.
Each restart primes the fuel lines and drags more petrol through your filter and into the pump. So a misfuelled diesel Nissan Qashqai on the zig-zags outside Prior Weston Primary School and Children's Centre is a nuisance, whereas the same vehicle started three more times to be courteous is a fuel system instead of a tank. A passer-by will advise you to move the vehicle out of that gateway and sort it out later. Don't. Stay put, let people grumble, and call us.
You head off at the end, once we have fired it up and checked it runs smoothly on clean diesel, with the system primed. Before that, in the car park at The Jugged Hare, the contaminated fuel comes out of your tank, the fuel lines get rinsed and the fuel filter comes off where your Mercedes C-Class has a serviceable one. It all begins with three questions when our engineers reach your car: what got in, how much of it, and whether it has been fired up since.
Calling from close to St Giles' Hospital (site of)? Three things help us. The filler — which side of the vehicle it's on. Room for our van alongside you, without the road being blocked. And if anything has run since the fill-up. The location itself hardly counts: on-street is where we work most, and we'd far rather have a narrow bay than a vehicle a person has driven somewhere quicker. Then it's a drain for the Ford Fiesta, a filter change where there is one worth changing, lines rinsed, clean fuel put round the entire system. By now the worst of that is in the lines and not your tank.
What happens next is the trouble. The engine at once draws the petrol still resting in the filter and the feed lines back round through the pump a second time, because emptying a tank does nothing about fuel that has already left it. Drain it and put clean diesel in, a person confident will tell you — and that suggestion is only half right, as do it to a diesel Citroen C4 Picasso parked up, Barbican Centre (Cinema) say, and the thing starts, which is what makes it sound sensible. Phone us instead. Our engineers flush your circuit and take the fuel filter off where the car has a working one, and that is the difference between your car being fixed and your car merely starting.
Areas our team cover around Barbican
Those same rounds get us to London, Farringdon, St Lukes, Shoreditch and Blackfriars besides Barbican, which is a residential suburb.
We still come. Those places above are just the closest neighbours, and a page is there for most towns across Greater London, and so an absence from the list is not an absence from the coverage. Phone to check rather than guessing — county lines especially, and wherever your phone can get wrong.
The ground the page spans sits on this map. Roadside, forecourt, private drive, car park: the lot is ground we work on, and none of that needs the vehicle to come to us.
Barbican: broken down where you pulled up
Not everyone has a chance to pull in somewhere safe. If you noticed after setting off and finished up along the verge of Wood Street, or in a lay-by somewhere with your hazards flashing, that's a common call for us rather than an odd one.
Whether you sit with the motor or stand clear of it depends on if sitting there is sensible. Don't restart it to get to a better place. It'll go — a diesel on petrol generally obliges — and each mile of obliging draws the blend deeper into the fuel system. We will send our van to an inconvenient location without any bother, and for the vehicle that's a lot better than carrying on.
Petrol in a diesel, and your car has travelled
This is where the M1 comes in, under 10 miles away from Barbican. A loss of power, an uneven idle, some smoke: those are the symptoms when they come, instead of a neat stop — and a misfilled diesel will frequently take you onto it and some way along before anything seems wrong at all.
Never restart it to reposition. Come off at the next sensible junction then turn off. On a longer run — anything approaching the under a mile to the closest city — take it the petrol has been through the fuel filter, the pump and the injectors, and say so when you ring. It alters what our engineers bring.
A bit about Barbican
Barbican is a suburban area in central London, situated on the north bank of the River Thames at an elevation of around 24 metres. Barbican is characterized by its predominantly flat-type housing and is located close to nearby places such as Farringdon and St Lukes. Barbican is a densely populated area with approximately 10,980 residents, and its proximity to London makes it a desirable location. Barbican sits in a strategic position, with the city of London just 0.3 miles away.
What follows when our engineers reach you around Barbican
- Our technicians ask first, price after. What was put in? How much? Has your engine run? Those replies change what the work really is.
- Our engineers empty the tank of all the contaminated fuel.
- Fuel lines are rinsed through and the fuel filter cleaned, leaving nothing in the fuel system that started any of this.
- Your system gets bled, on clean diesel.
- After it is turned on, we confirm it runs correctly on clean diesel.
That has your car ready to drive away. Permanent damage is very unusual when it has been spotted early, and since all of this is done where your car is, it never needs to be taken to a garage.
A distinct problem: AdBlue in a diesel tank in Barbican
AdBlue instead of petrol? Then the opening rule is unchanged — your engine stays off — whereas the issue underneath it is a different one altogether. Petrol weakens your diesel and strips the lubrication your fuel system depends on. AdBlue is urea dissolved in water, and in a diesel tank it leads to corrosion and residue instead.
AdBlue removal around Barbican has a page of its own with the full story on it, including why it's usually the more serious of the two. Our technicians handle both.
Barbican prices for a petrol-in-diesel drain
We can't put one price on this page truthfully, because the job is not one job. What moves it:
- Started? Driven? Either answer counts more than anything else on this list.
- The tank's capacity, set against how much of the wrong fuel went into it.
- Which went in: petrol or AdBlue.
- Where the car is, and whether our van can safely reach and work on it.
A clear answer rather than a range is what you get for telling us three things: your car, the amount, and if it has run. Car at home, going nowhere, nothing urgent about it — is good for that.
Barbican drivers ask us these about petrol in diesel
Fuel drains on a Barbican petrol station forecourt
Plenty of what our technicians do happens nowhere else. So yes. Our engineers work at Texaco and the other forecourts around town all the time, with the site's consent — tell us which one you're at when you phone and we'll tell you if our technicians can work there.
How much petrol is too much for a diesel?
Whether your motor has run counts far more, though the ratio counts too, instead of the litres. What decides how much work is required is if that mixture has been drawn through your fuel system — because even though five litres in a nearly empty tank is a separate matter from five in a full one, either way that is the query.
Already driven it with petrol in your diesel? Now what?
Switch off somewhere sensible, and keep it that way after you stop. Not restarting it is the single most useful thing available to you now. Driving does move the issue out of the tank and into your pump and injectors, yes, and it stays fixable far more often than people assume.
Is a fuel drain going to void my warranty?
It isn't a modification, and so a drain and flush carried out properly doesn't void a manufacturer's warranty. Running a diesel on petrol is the thing likelier to cause a disagreement with one, which is another reason to leave the vehicle switched off.
Can I just add two-stroke oil and drive home?
Two-stroke oil solves a separate fault, and an old one at that. Nothing it does puts back what petrol weakened. No. The pump still has to cope with it, as your tank still has petrol in it afterwards.
Main dealers and petrol in a diesel
You do not need one. Your car is drained and flushed wherever it is, with no need to take it to a main dealer.
Waiting next to it?
The engine remains off.
If you have already driven the vehicle, stop somewhere sensible, switch it off and leave it off. Cold, still, going nowhere: that is the best position to be in. People fear this far more than they need to.
On-site fuel draining around Barbican and across Greater London — at the roadside, on the forecourt or at home.