Croydon: Put Petrol in a Diesel Car?
With your tank still holding the fuel and your engine not yet turned over, almost every job takes only a drain, so keep the motor off. That result is decided in the minutes straight after filling up, and not by the amount that went in. All over Croydon and the rest of Greater London, Petrol in Diesel drains the vehicle and flushes it where it is, whether at a roadside, on a private drive or at a forecourt. Our technicians can show you what the next stage is. Contact us — that comes ahead of everything else.
What to do first about petrol in a diesel
- Don't crank it. Fired up all the same? Then never trust it. Diesel in a petrol vehicle normally cannot run, so the person stops and the damage halts with them. Petrol in a diesel? It starts. It idles. It moves off fine, for several miles. People get that reversed. It is not all right — the fuel system is wearing every mile you drive.
- Diesel burns, and before it ignites it lubricates — your high-pressure pump, those injectors. Petrol handles only the burning. So leave the ignition be as well: turning it on is commonly enough to prime your system, and priming draws petrol from your tank into just those parts.
- Don't tip diesel on top to weaken it. A diesel fuel system won't handle petrol by percentage as that advice presumes, and topping up removes nothing — it just gives you a bigger tank of the same mix. The octane makes no difference either: super unleaded is just petrol.
- A car that has not moved is the simplest one to handle, and so stay where you are if you sensibly can. Stopped on the verge on North End? Hazards on, and leave the vehicle there. A tricky location suits us better than a started engine.
- Our van showing up rather than circling turns on two things: a postcode that starts CR0 1, and whatever is next to you with a sign on it. Keep both prepared before you dial.
- Ring 0333 366 0103. Let us know what was put in, roughly how much, and whether the engine has run. These three answers determine the whole call-out.
Can petrol be drained out of a diesel at the forecourt?
A fair share of the work is completed at a forecourt, since that is where it often begins. The drain usually gets done on the spot. Still on the forecourt at BP? Given the station's agreement, that's a place our technicians work, and routinely.
The forecourt is the only location it gets spotted before your engine has fired. We can still deal with it where it stands, even away from the pumps. In a car park, on a private drive or in a lay-by, the car has been switched on and driven there, and that pulled fuel through the fuel filter and into the high-pressure fuel pump, all the way from your tank. None of that is a catastrophe, but the flush then has to reach past the tank to the lines and the filter, and the few seconds between checking your receipt and going for the key are what decide that.
Away from the pump, the next motorist can get through — so yes, let the staff help you move the vehicle. Very much worth doing. Rolling it four bays does not warrant firing it.
The complicated part is that bay, not the fuel. Motors either side of you, a trolley shelter behind, and from time to time a height barrier on the way in that decides whether our van can reach you at all — so when you phone from a car park like the one outside Abad Halal Supermarket, say how much clearance there is about you and which way round the car is. Those our engineers cover regularly. Should there be no room to work beside your diesel Audi A4, it gets shifted with your engine off, and not out of pedantry over a few seconds of running: priming occurs at every start, more of that mixture departs that tank for your pump, and two shunts into a better bay have silently made a worse job of what was just a motor sitting still.
How far, and how hard? The second of those matters more than the first, and so have both ready. Your Ford Focus will have seemed perfectly normal on the way back from St Mary's Catholic Infant School — they all do, and that is the snag. Diesel into a petrol car mostly won't run at all: the motorist stops, and so does the damage. Petrol into a diesel fires up, idles, drives off like nothing happened, while the high-pressure fuel pump gets on with its work minus the protection your fuel should be giving it. No warning comes, because behind the wheel nothing looks wrong.
Chance the drive home from Dog & Bull? Don't. It will fire up and it will pull away quite happily, which is the problem — a diesel on a thinned tank runs usually while wearing down the parts the fuel should be lubricating. Leave the Mercedes C-Class then phone us.
Three things help when you ring from close to The Front Room: which side the filler is on, whether a technician can pull up alongside without blocking the road, and whether the engine has run since you filled up. On-street is the usual location our technicians work, and so the location itself is hardly ever the issue — we would far rather deal with a tight parking space than with a motor that has been driven to somewhere more convenient. We will drain the Vauxhall Astra, change your filter where there's a workable one, flush the fuel lines then put clean fuel through the entire system, as by this point the worst of that is sitting in the fuel lines instead of in the tank.
A few streets, then it stopped. Throttle dead, idle ragged, and the diesel Kia Sportage is parked up by Croydon Clocktower. Your engine isn't failing — that deadness is fuel that will not build pressure. There is no light on the dash for it, so vehicles like yours typically get driven a second time before anyone picks up the phone. Don't. Off, then ring us.
Can our technicians serve your corner of Croydon?
Croydon is a small village, and so we head out to the town and to the areas by it on the same trips: Wandle Park, Broad Green, Waddon, Selhurst and Addiscombe.
If yours isn't on the list that does not mean we don't come — there are separate pages for nearly all locations around Greater London, and the ones mentioned above are merely the immediate neighbours. Assuming is the mistake to skip, especially on a border or anywhere your satnav struggles. Ring us to ask.
The patch the page covers appears on the map. We operate roadside, at forecourts, on driveways and at car parks across all of it, and your car never needs to travel to us.
Croydon: broken down wherever you stopped
The chance to pull over somewhere suitable doesn't fall to everybody. If you worked it out after setting off and landed along the verge of Bell Hill, or in a lay-by somewhere with the hazard lights flashing, that's a routine call for us rather than an odd one.
Wait with the car while it's wise to wait in it, and clear of it if it is not. Never start it up to get to a nicer spot. It will go — a diesel on petrol usually obliges — and each mile of obliging drags that mixture deeper into the system. Carrying on does the vehicle far more harm than a technician heading out to an awkward spot, and that's no problem for us.
Run it already? Stop, and read this
under 10 miles from Croydon, the local M23 is what counts here. Lost power, a rough idle, some smoke: those are the symptoms when they appear, rather than a neat stop — and a misfuelled diesel will often get you onto it and some distance along before anything seems wrong at all.
Take the next exit that is sensible, stop there, and never restart it to move it. It affects what our engineers bring, and so say so when you call: on a longer drive — anything near the under 10 miles to the closest city — assume the mixture has been through your filter, the pump and your injectors.
About Croydon
Croydon is a locality in south London, situated near the River Wandle and surrounded by areas such as Wandle Park, Broad Green, and Waddon. Croydon sits at an elevation of 61 metres, approximately 9.3 miles from central London, with Westminster being the nearest city centre. Croydon is predominantly composed of flat dwellings, housing a population of around 5809 residents. Croydon is located in a densely populated urban area, with a mix of old and new buildings.
The job in Croydon, step by step
- Our engineers ask first, price after. What got in? How much? Has the engine run? Those replies alter what the work really is.
- The polluted fuel is drawn from the tank.
- We purge the lines and clean the fuel filter, so what is left in the fuel system is not what started the trouble.
- Priming follows, once new diesel is in.
- Your engine is fired up and checked to be sure it runs correctly on fresh diesel.
Your car is then ready for you to drive away. Everything is done where the car is, so it never has to be taken to a workshop, and when it has been caught quickly, permanent damage is very rare.
AdBlue in the diesel tank by mistake, in Croydon?
AdBlue rather than petrol? Then the opening instruction is unchanged — your motor stays off — whereas the fault under it is a distinct one altogether. Petrol does two things to diesel: dilutes it, and removes the protection the fuel system depends on. AdBlue? Urea dissolved in water. Pour that in with your diesel and you get corrosion instead, plus deposits.
AdBlue removal around Croydon has a page of its own with the detail on it, including why it is frequently the more significant of the two. We deal with both.
How much is a petrol-in-diesel fuel drain in Croydon?
Truthfully, no single figure fits on a page like this. The job differs. Here is what moves it:
- This is the key one: whether your engine has been run, or driven.
- How much of the wrong fuel was put in, measured against how much the tank can hold.
- The type of liquid in the tank, unleaded or AdBlue.
- Where is it? And can a van reach it and work there safely?
A firm answer instead of a range is what you get for telling us three things: your car, the amount, and whether it has run. Car at home, going nowhere, nothing urgent about it — is fine for that.
Petrol in diesel questions from Croydon drivers
Can you do a fuel drain at a petrol station in Croydon?
Much of what we do gets done nowhere else. So yes. Regularly, provided the site consents: Sainsbury's, plus every other forecourt nearby. Say on the phone where precisely you have stopped. Whether we can work in that location is something we answer straight away.
Is there a sensible amount of petrol in a diesel?
Ratio settles it rather than litres — and more than either, whether the motor has run. What determines how much work is required is if that blend has been sucked through the system — because even though five litres in an almost empty tank is a distinct situation from five in a full one, either way that's the query.
I drove the car after putting petrol in my diesel. Now what?
Pull in somewhere sensible, switch off, then leave the vehicle off. It's salvageable far more often than drivers expect, even though driving is what moves the trouble from the tank into your pump and injectors — and the single most helpful thing you can do now isn't restart it.
My warranty — does a fuel drain void it?
A manufacturer's warranty survives a drain and flush done to a correct standard, which is no alteration at all. Another reason to leave it switched off: running a diesel on petrol is the thing likelier to cause a disagreement with one.
Adding two-stroke oil, then driving home
No. Two-stroke oil is an old remedy for a distinct fault and it doesn't restore what petrol has weakened. Petrol remains in that tank after that, whatever else goes in, and the pump gets no reprieve from it.
Does petrol in a diesel have to go to a main dealer?
There's no need to bring it to a main dealer, as we drain and clean the car wherever it is.
You, and the vehicle, still together?
Do not switch it back on.
Switch it off somewhere sensible and leave it off, if you have already driven it. This is recoverable from far more often than drivers fear, and a stationary, cold vehicle is the best place to be in.
Emptying misfilled cars, Croydon and the rest of Greater London, wherever they are. Roadside. Forecourt. Home.