Kirkstall: Put Petrol in a Diesel Car?
If you have not turned on the engine as yet, do not. A fuel drain and nothing else is almost always what a vehicle needs while the petrol is still in your tank and the motor has not turned over, which is why it's the coming few minutes that count, not how much went in. Petrol in Diesel travels to the car wherever it has come to rest in Kirkstall or the rest of West Yorkshire, on the forecourt, at the roadside or on a driveway, and drains and cleans it there. Phone before all else begins, and you will learn what follows next.
What to try next about petrol in a diesel
- Never fire it up — and don't trust it if it runs. That is the bit drivers get wrong about petrol in a diesel especially. A petrol engine given diesel typically just can't run, so the driver stops and the harm stops with them. A diesel filled with petrol typically starts, ticks over and moves off perfectly well for a few miles. It's not fine. It is eating into the fuel system as you drive.
- Diesel burns, and before it combusts it protects — the injection pump, the injectors. Petrol handles only the burning. So leave the ignition be as well: turning it on is often all it takes to prime the system, and priming moves petrol from that tank into just those components.
- Never tip diesel on top to weaken it. A diesel fuel system will not cope with petrol by percentage the way that guidance suggests, and topping up removes nothing — it simply gives you a bigger tank of the same blend. The grade makes no difference either: super unleaded is simply petrol.
- Stay still if it is sensible to. Hazards on, engine off, leave the car. Wherever you have stopped — the verge on The Rise, anywhere — a difficult location for us trumps a started diesel, and nothing is simpler for us to deal with than a car that never moved.
- Our van arriving instead of circling rests on two things: a postcode that starts LS5 3, and whatever is next to you with a name on it. Keep both ready before you call.
- Phone 0333 366 0103. Expect three questions — what went in, about how many litres, and whether the engine has been started. Your responses decide all that happens next.
The high-pressure pump did that morning drive labouring on a liquid that had shed most of the protection it is made for. Diesel protects that pump, and your injectors with it, before any of the fuel burns; petrol does the burning and none of the lubricating. So picture a diesel Volkswagen Tiguan, topped up at quarter past eight, taken in to work, and parked sitting at Headingley till you realise close to eleven. Three hours of sitting have changed nothing about it. The couple of miles before that changed a lot, which is why the thing our engineers ask you is about mileage not hours. Phone us. Leave it precisely where it is.
We're in car parks like the one outside The Food Warehouse a lot, and it is hardly ever your fuel that complicates them. It's the bay. Vehicles both sides. Trolleys stacked up behind. Occasionally a height barrier at the entrance, which determines if a van can reach you at all. So say how hemmed in you are when you phone, and which way the car is pointing. If there's no clearance to work next to the BMW 3 Series, we roll it without the motor. That is not fuss over a couple of seconds: starts prime things, mixture comes out of the tank towards the pump, and a car moved twice for a better spot is gradually a bigger job than one nobody touched.
Your diesel Dacia Duster will have felt completely usual on the way back from Kirkstall St Stephen's Church of England (VA) Primary School. They do, and that is the trap with petrol in a diesel instead of the other way round. Put diesel in a petrol motor and it mostly will not run, and so the driver stops and the wear stops with them. Put petrol in a diesel and it starts, idles and moves off as though nothing has happened — all the while your high-pressure pump keeps working without the protection your fuel is supposed to be supplying. Nothing alerts you, as from behind the wheel there's nothing to warn you about. Phone with about how far you went and how hard you drove it; the second answer matters more than the first.
You set off at the end, once we have started the engine and made sure it runs properly on fresh diesel, with your system bled. Before that, in the car park by West End House, the tainted fuel comes out of that tank, the fuel lines get cleaned and the fuel filter comes off where your Peugeot 3008 has a replaceable one. It all begins with three questions when we reach your car: what was put in, how much of it, and whether it has been started since.
Diesel has to be thick enough to seal the precision components it runs through, and petrol weakens it. That is the entire process, and it explains the normal Morris Wood call: a diesel Mercedes E-Class that drove out there without a murmur and came back down on power, uneven at idle, maybe smoking a little. A diesel injection system works hydraulically as well as chemically — it requires the fuel to hold pressure, not just to burn — so when the fuel dilutes, pressure that should build then stay built starts leaking past tolerances instead, and the motor gets a weaker, later, less even delivery than it was built about. None of that is your engine failing, which is the bit worth hearing: it is your fuel no longer behaving like diesel, and it stops when the fuel is sorted.
Can petrol be drained from your diesel at a forecourt?
The work starts at the pump, usually. Frequently the work wraps up there as well. If you are still on the forecourt at Morrisons, that's generally where the drain takes place — we work on station forecourts routinely, with the station's consent.
Before the motor has fired — the forecourt is the single spot the mistake is spotted. Everywhere else — a car park, a driveway, a lay-by — the car was fired up and driven to get there, which means fuel was sucked from that tank, through your filter and into the high-pressure fuel pump. That's not a calamity, and we can still sort it out where it sits. It does mean your lines and your filter need rinsing as well as your tank, and that is decided by the few seconds between checking your receipt and going for the key.
Clear of the petrol pump, the next motorist can get through — so yes, let the attendants help you move the car. Well worth it. Shifting it four lengths does not warrant cranking it.
Kirkstall plus the places next to it
As a residential suburb, Kirkstall sees a regular call, whilst its neighbours close by go along on the same run: Sandford and Hawksworth, West Park and Moorside, Whitecote.
Not on that list? That tells you nothing. The names above are just the nearest few, and nearly all towns in West Yorkshire have a page of their own somewhere on our site. Call us to check instead of guessing, especially if you're on a border or somewhere a satnav can't find.
Use the map for the ground included on this page. The vehicle doesn't need to move to us. We operate over all of that — roadside, forecourts, driveways, car parks.
Stuck at the roadside anywhere around Kirkstall?
A chance to pull in anywhere safe doesn't fall to everybody. Set off, then noticed? Finished up on the verge beside Abbey View, or sat in some lay-by with the hazard lights on? That is a routine call here. Not an unusual one.
Whether you remain by the vehicle or keep clear of it hangs on whether being there is safe. It will usually oblige. A diesel running on petrol limps along quite willingly, and that is the problem: fire it up to reach somewhere safer and that mixture goes further into your fuel system with every mile covered. However inconvenient the place, it is no bother for us to come to it, and that's a lot better for your car than carrying on.
Already run it? Petrol in a diesel over a few miles
Here is where the A58(M) comes into it — under 3 miles away from Kirkstall. A wrongly fuelled diesel will frequently get you onto it and some distance along before anything feels wrong, and the signs when they come are usually a loss of power, a rough idle and some smoke instead of a tidy stop.
Take the next exit that is safe, pull up there, and don't restart the car to reposition. It alters what our engineers bring, and so say so when you phone: on a longer drive — anything near the under 3 miles to the closest city — assume the petrol has been through the fuel filter, your pump and the fuel injectors.
Kirkstall itself
Kirkstall is a suburban area in West Yorkshire, situated on the banks of the River Aire, approximately 2.6 miles from Leeds city centre. Kirkstall sits at an elevation of around 63 metres, with its riverside location influencing the local landscape. Kirkstall is characterized by its predominantly terraced housing stock, reflecting the area's historical development as a residential suburb of Leeds. Kirkstall is close to nearby places such as Sandford, Hawksworth, and West Park, forming part of the wider Leeds urban area.
What comes next when we arrive with you in Kirkstall
- We ask first, quote after. What got in? How much? Has your engine run? Those answers shape what the work really is.
- We drain your tank of the contaminated mixture.
- Fuel lines are flushed through and your filter cleaned, leaving nothing in the system that created any of this.
- The system gets bled, on fresh diesel.
- It is fired up with clean diesel in it, and our engineers make sure that it is running smoothly.
Your car is then ready for you to drive away. Everything is done where the car is, so it never needs to go to a workshop, and when it has been noticed quickly, lasting damage is very rare.
A different problem: AdBlue in a diesel tank around Kirkstall
The issue is not the same, though the opening rule is — don't fire it up — if what got in was AdBlue instead of petrol. Petrol does two things to diesel: thins it, and strips out the protection the fuel system depends on. Rust and build-up are what a diesel tank ends up with instead, as AdBlue is urea dissolved in water.
Both are ours. There's a separate Kirkstall page for AdBlue removal, with the details on it — including the reasons it often turns out to be the worse of the two.
Budgeting for a petrol-in-diesel drain around Kirkstall
One number would not be honest here, as this is not one job. These are the things that shift it:
- Whether the engine has been started or driven. This is the main one.
- How much of the wrong fuel went in, weighed against how much your tank takes.
- The sort of fluid in the tank, petrol or AdBlue.
- Where is it? And can our van reach it and work there sensibly?
Tell us your car, the amount and if it has run, and you'll get a firm answer instead of a range. Vehicle at home, going nowhere, nothing time-critical about it — is ideal for that.
Petrol in diesel: everyday questions around Kirkstall
Can you do a fuel drain at a petrol station around Kirkstall?
Plenty of what our technicians do happens nowhere else. So yes. Our engineers attend BP and the other forecourts locally all the time, with the site's permission — tell us which one you are at when you call and we will tell you if our engineers can work there.
A couple of litres of petrol in a diesel — too much?
It rests on the proportion rather than the litres, and far more on whether the engine has run. A nearly empty tank with five litres in it, against a full one with the same five: different situations, of course. Either way, the work required comes down to one thing, which is if the fuel system has had that mix pulled through it.
Already driven it with petrol in the diesel? What then?
Somewhere safe, then stop, then switch off and keep it off. Driving shifts the problem along — out of your tank, into your pump and injectors. Motorists fear it a good deal more than the recovery rate warrants, mind. The one really useful thing left to you is not restarting the car.
Will a fuel drain void my warranty?
A drain and flush carried out correctly is not an alteration and doesn't void a manufacturer's warranty. What is likelier to start a dispute is a diesel that has been run on petrol. One more good reason for your engine to stay off.
Could I put some two-stroke in and just drive?
Two-stroke oil solves a separate issue, 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 after that.
Do I need a main dealer for petrol in a diesel?
You don't need one. The car is drained and flushed wherever it is, with no need to bring it to a franchised dealer.
Is the vehicle still with you?
Switched off is the way the car stays.
Switch it off somewhere sensible and keep it off, if you have already driven it. Cold, parked, going nowhere: that's the best place to be in. Drivers fear this far more than they need to.
Draining misfilled motors, Kirkstall and the rest of West Yorkshire, wherever they are. Kerbside. Forecourt. Home.