Put Petrol in a Diesel Car in Brixton? Don't Start It
Petrol in Diesel drains and cleans wrong-fuelled vehicles where they stand, on the forecourt, at the roadside or on a private drive, across Brixton and the rest of Devon. The first thing to do is not to fire up the engine. While the engine has not been started and the petrol is still in that tank, a fuel drain is nearly always all it takes, and the following few minutes decide that, not how much went in. Phone and our engineers shall explain what follows from here before you attempt much else.
The next five minutes: petrol in a diesel
- Give a petrol motor diesel and it will usually fail to run at all, so the motorist stops there and so does the wear. Give a diesel petrol and the engine starts, it idles, it pulls away — fine for a few miles. Most people have that muddled, which is the thing they get wrong about petrol in a diesel specifically. So never start the car. And if started, do not rely on it: your fuel system is wearing down as you drive.
- Leave the car's ignition be too. Diesel has two jobs: it combusts, and before it burns it lubricates the injection pump and those injectors. Petrol manages the first but not the second. Switching your ignition on is often sufficient to prime the system, which pulls that petrol out of the tank and into precisely those components.
- Topping up takes out nothing. It gives you a bigger tank of the same mix, since a diesel fuel system won't tolerate petrol by percentage in the way that guidance implies — so don't add diesel on top to water down it. Grade is immaterial too: super unleaded is petrol.
- Stay still if it is sensible to. Hazards on, motor off, leave the vehicle. Wherever you have stopped — the verge on Elliotts Hill, anywhere — a difficult location for us beats a started engine, and nothing is easier for us to deal with than a vehicle that never moved.
- Find out where you are before ringing. A postcode that starts PL8 2, and the name of whatever is next to you. Otherwise the technician circles instead of turning up.
- Three facts decide the whole call-out: the liquid you put in, the rough volume of it, and if anything has been going since. The line is 0333 366 0103.
The journey back would close to double it, for no purpose at all. One commute has already put a real amount of petrol-thinned diesel through the high-pressure pump of your Renault Megane. So leave the vehicle where it sits. Phone us from the platform if that's easier — no one needs you hovering over the car at Plymouth whilst our technicians get it done, and tonight beats finding out on Monday.
The call our technicians want goes like this: diesel Volkswagen Passat, a few litres of unleaded, driven a couple of miles, now switched off outside Lidl. What we are truly asking is how much fuel the pump has pulled — not how long ago it was.
Try the journey home from The Foxhound? Don't. It will start and it will pull away quite happily, which is the issue — a diesel on a thinned tank runs generally whilst grinding the components the fuel should be lubricating. Leave the Ford Focus and call us.
We rinse the lines rather than only draining the tank, and the reason is that diluted fuel has already arrived at your filter and the pump: it was a start and a drive, however short. The distance genuinely assists — pulled off the forecourt, receipt read, a diesel Kia Sportage parked up by St Mary a few hundred yards later is about as well as this goes once the motor has turned. Call us then leave it off.
What takes place next is the trouble. Your engine straight away pulls the petrol still waiting in your filter and the feed lines back round through the pump a second time, since emptying a tank does nothing about fuel that has already left it. Drain it and put fresh diesel in, a person certain will tell you — and that tip is only half right, as do it to a diesel Peugeot 2008 parked up, Ruined Bridge say, and the thing starts, which is what makes it sound sensible. Call us instead. Our technicians flush your system and take the fuel filter off where the vehicle has a serviceable one, and that is the difference between the vehicle being put right and the vehicle merely starting.
On the forecourt: clearing petrol from a diesel
Forecourts are where this job usually kicks off, and where a big share of it finishes. If you're still at the forecourt at Valero, that is typically where the drain takes place — our technicians work on petrol station forecourts all the time, with the station's permission.
At the forecourt, it is stopped with your engine never started, and no place else manages it. Anywhere else — a car park, a drive, a lay-by — your car was started and driven to get there, which means fuel was drawn from that tank, through the filter then into the high-pressure pump. That is not a catastrophe, and our engineers can still deal with it where it is. It does mean the fuel lines and the filter need flushing as well as that tank, and that is settled by the few seconds between checking your receipt and reaching for the keys.
Clear of the pump, the next driver can get through — so yes, let the attendants help you wheel the vehicle. Very much worth it. Four vehicle lengths isn't worth a restart.
Do our engineers cover your part of Brixton?
Those same runs take us to Combe, Sherford, Elburton, Spriddlestone and Blackpool along with Brixton, which is a coastal village.
There are dedicated pages for most locations across Devon, and the ones named above are merely the closest neighbours — so yours being absent from the list means nothing about if our technicians come. Near the boundary, or somewhere the satnav gets wrong? Ring us and ask rather than guessing.
Look at our map for the area included on this page. Kerbside, forecourt, private drive, car park: all of that is territory we serve, and none of that asks the vehicle to travel to us.
Stuck on the kerbside in Brixton
Some drivers get no suitable place to stop at all. Hazards flashing in a lay-by somewhere, or pulled onto the verge beside A379 because you worked it out after setting off — our technicians take that call often enough that it's the ordinary kind.
Okay there? Stay with it. Not safe? Climb out and away from it. Every mile a diesel obliges you for on petrol draws that mixture further into your fuel system — and oblige it frequently will, which is why your motor does not get restarted to limp somewhere handier. We will send the van to a tricky place without any trouble, and for your car that is a lot better than pressing on.
So you've driven it? Petrol in a diesel over some miles
Here is where the M5 counts, under 50 miles out of Brixton. Some way along, and onto it in the first place: a misfilled diesel will often manage both before anything feels wrong. What you get then is seldom a tidy stop. Power falls away, your idle gets rough, and there may be some smoke.
Do not restart it to reposition. Come off at the next sensible exit then switch off. On a longer trip — anything close to the under 5 miles to the closest city — take it the contamination has been through the filter, your pump and the fuel injectors, and tell us when you call. It affects what we bring.
A little about Brixton
Brixton is a small coastal village in Devon, situated near the city of Plymouth and overlooking the sea from a height of around 55 metres. Brixton has a mix of housing types, but detached homes are particularly prevalent in the area. Brixton is close to other nearby villages such as Combe and Sherford, and is within easy reach of the larger urban centre of Plymouth.
Our call-out in Brixton, step by step
- Our engineers ask first, price after. What was put in? How much? Has your engine run? Those replies shape what the work actually is.
- Our engineers drain the tank of all the contaminated mixture.
- We purge the fuel lines and clean your filter, so what is remaining in the system isn't what started the problem.
- We pour new diesel in and prime the fuel system.
- Your engine is started and tested to make sure it runs properly on new diesel.
At that point it's ready to drive away. Lasting damage is very rare when it has been spotted early, and since everything is done where the vehicle is, it never needs to be taken to a workshop.
AdBlue in a diesel tank in Brixton is a separate problem
The issue is not the same, though the opening instruction is — don't fire it up — if what got in was AdBlue instead of petrol. Petrol does two things to diesel: thins it, and takes away the lubrication the system depends on. AdBlue? Urea dissolved in water. Pour that in with your diesel and you get rust instead, plus deposits.
We handle both, and AdBlue removal in Brixton has its own page with the details — including why it's frequently the more significant of the two.
What a petrol-in-diesel fuel drain will cost in Brixton
We cannot put one figure on this page truthfully, since this job isn't one job. What changes it:
- Has it been run or driven? Nothing else counts for as much.
- The tank's capacity, set against how much of the wrong fuel got into it.
- Which went in: petrol or AdBlue.
- Access: the car's position, and whether working on it there's safe for a van.
A clear answer instead of a range is what you get for telling us three things: the vehicle, the amount, and if it has run. For the vehicle at home that's going nowhere and isn't pressing, works too.
Brixton motorists ask us these about petrol in diesel
Can you do a fuel drain at a petrol station around Brixton?
Plenty of what our technicians do gets done nowhere else. So yes. We visit Asda and the other forecourts around town routinely, with the site's agreement — tell us which one you're at when you call and we will tell you whether we can work there.
How much petrol is too much for a diesel?
Proportion decides it instead of litres — and more than either, whether the motor has run. A nearly empty tank with five litres in it, against a full one with the same five: separate situations, definitely. Either way, the work required comes down to one thing, which is if the system has had that mix sucked through it.
I drove the car after putting petrol in my diesel. What next?
Stop sensibly. Off. Nothing after that. Not restarting it is the single most helpful thing available to you now. Driving does move the problem out of the tank then into the pump and injectors, yes, and it remains recoverable a lot more commonly than drivers fear.
My warranty — does a fuel drain void it?
No. Carried out correctly, draining and flushing is no alteration at all, and the warranty from your manufacturer is untouched by it. An argument over a warranty is likelier to come from running a diesel on petrol — so leave it switched off.
Two-stroke oil in the tank, and then home?
What petrol has diluted is not replaced by two-stroke oil, which is an old workaround for a separate fault. So no. Later on? Still petrol in the tank, and a pump that has to live with the stuff.
Main dealers and petrol in a diesel
You don't need one. Your car is drained and flushed wherever it is, with no need to bring it to a dealership.
Standing next to it?
The engine stays off.
If you have already driven the vehicle, stop somewhere safe, switch it off then leave it off. Cold, still, going nowhere: that is the best position to be in. Drivers fear this much more than they need to.
Throughout Devon and around Brixton: on-site fuel draining, at home or on the forecourt or at the roadside.