Langtoft: Put Petrol in a Diesel Car?
With your tank still holding the petrol and your engine not yet run, nearly every job takes only a drain, so keep the engine off. That outcome is decided in the minutes immediately after the fill-up, rather than by the amount that was put in. Across Langtoft and the rest of Lincolnshire, Petrol in Diesel drains the car and flushes it where it stands, whether by a roadside, on a driveway or at a forecourt. Contact us before anything else happens, so you'll know what follows after that.
Your first five minutes: petrol in a diesel
- Give a petrol motor diesel and it will generally refuse to run at all, and so the person stops there and so does the wear. Feed a diesel petrol and the car starts, it idles, it pulls away — fine for several miles. Drivers have that reversed, which is the thing they get wrong about petrol in a diesel especially. So don't fire it up. And if started, never rely on it: the fuel system is grinding as you drive.
- Leave your ignition alone as well. Diesel does two roles: it combusts, and before it burns it lubricates your high-pressure fuel pump and those injectors. Petrol handles the first and not the second. Flicking the car's ignition on is commonly enough to prime the system, which pulls that petrol out of the tank then into exactly those parts.
- Don't thin it. Diesel put on top clears nothing, and so all you get is more of what was already there, because percentage isn't how a diesel fuel system handles petrol. Super unleaded? Just petrol. The type makes no difference.
- A vehicle that has never shifted is the simplest one to deal with, so wait where you are if you safely can. Pulled up on the verge on East End? Hazards on, and leave it there. An awkward location suits us better than a started engine.
- Before you call, work out your position. Anything next to you with a name on it, plus a postcode starting PE6 9 — that is what decides whether the van turns up or circles.
- What was put in, roughly how many litres, and also if the motor has started — these three facts settle the full visit. Phone 0333 366 0103 and tell us.
Clearing petrol from your diesel at a forecourt
Most of this work starts at a forecourt, meaning a big share of that gets done at one. Still at BP? Then that's generally where it happens. Garage forecourts are everyday for us, with the permission of the owner.
A forecourt is the single spot this can be stopped before the engine has run. Fuel drawn out of the tank and through your filter, right to the high-pressure fuel pump, is what occurs when the engine is fired up and your car is driven to where it is now: the car park, the private drive or the lay-by, anywhere other than the forecourt. So the flush includes your filter and your lines together with that tank. That is still not a disaster, and our technicians put it right where your car stands. What decides it is whether the key was turned in the seconds after your receipt was checked.
The attendants will usually offer to push it clear of the pump so the next driver can get by. That's worth doing. Starting it over four car lengths? Never.
How much fuel the pump has sucked is what we're actually asking — not how long ago any of that was. So the phone call our technicians like goes like this: diesel Skoda Octavia, some litres of unleaded, a couple of miles done, now switched off at Tesco.
Straightforward job, this one — till someone drives it home. A diesel Mercedes C-Class parked outside Waggon & Horses with petrol in that tank loses nothing by standing there overnight, and so park the car then ring us once it is light. Expect a question about the drive there, though. Brief and chilly is precisely where petrol battles to burn, and what will not burn can slip past the rings then into the oil.
Happy on the way out, gutless on the way back. If that is how the drive to Black Bull Green went, that tank is where to look. Petrol weakens diesel, and runnier fuel seeps past the precision components that are supposed to build injection pressure — so the further your Dacia Duster travelled, the less well it held that pressure. Pull in somewhere safe, turn off then ring us.
Petrol in a diesel does its damage as a share, which is the reason our technicians ask at all: the same few litres waiting in an almost empty tank make a far stronger mix than they would in a full one. And petrol is rated on how well it withstands igniting under pressure — the opposite of what a diesel needs — so a stronger mix knocks more, smokes more, goes flatter. None of which means you need an answer prepared. Almost no one knows how full that tank was in a vehicle picked up two days ago, and our engineers work that out there. Do ring the hire or company firm first, though: some contracts want them to authorise the work, and that is far faster settled before than after. Then ring us about the Audi A6 near St Michael and All Angels Church.
Put right and starting are not the same thing, and the difference is the circuit: our technicians flush it, and take the fuel filter off where there is a serviceable one. Compare that with the confident advice you'll get — drain the vehicle, refill with new diesel. Only half right. Do precisely that to a diesel Kia Sportage by Langtoft Village Hall and it'll start, which is exactly why the tip sounds reasonable. Then the motor pulls the petrol left behind in your filter, and in the feed lines, straight back through the pump, as draining a tank does nothing whatever about fuel that has already left it. Phone us instead.
Can we reach your corner of Langtoft?
Baston, The Rectory, Market Deeping, Obthorpe Lodge, Wilsthorpe — all of them on the runs that carry us across to Langtoft too, a village.
There are separate pages for the majority of places around Lincolnshire, and the ones listed above are simply the closest neighbours — so yours being left off this list means nothing at all about whether our engineers come. Guessing is the mistake to skip, above all on the border or somewhere your satnav gets lost. Phone to enquire.
The map shows the area this page covers. Every bit of it is ground our technicians serve: a kerbside, a forecourt, a private drive, a car park. You never bring your car anywhere.
Roadside call-outs in Langtoft
Not everybody finds a decent place to pull in. Set off, then noticed? Finished up along the verge on Bourne Road, or sat in some lay-by with the hazards flashing? That's a normal call here. Not a rare one.
Out of the car when it's not wise to wait inside, by it if it is. Don't restart it to reach a nicer location. It will go — a diesel on petrol generally obliges — and each mile of obliging draws the mixture deeper into the system. Carrying on causes the car far more harm than our van driving out to an inconvenient spot, and that is no trouble for us.
A few miles on petrol in a diesel: what next?
Here is where the Great North Road matters, under 15 miles from Langtoft. Some distance along, and onto it in the first place: a misfilled diesel will frequently manage both before anything feels wrong. What you get then is seldom a clean stop. Power falls away, your idle turns uneven, and there may be smoke.
Take the first junction that's safe, pull up there, and don't start the car to move it. It alters what our engineers bring, so mention it when you call: on a longer trip — anything near the under 10 miles to the closest city — assume the petrol has been through the fuel filter, the pump and your injectors.
Langtoft itself
Langtoft is a village in Lincolnshire, situated on the banks of the River Welland, with a low elevation of around 9 metres. Langtoft lies near the city of Peterborough, approximately 9.6 miles away, and is close to other nearby places such as Baston and Market Deeping. Langtoft has a population of around 1308 people, predominantly living in detached houses. Langtoft is located in a rural area, with easy access to the nearby city and surrounding countryside.
What follows when our engineers reach you in Langtoft
- We check what went in, how much, and whether your motor has run. The answers change the work, which is why our engineers ask before pricing.
- Away flows the contaminated mixture.
- Fuel lines are rinsed through and your filter cleaned, leaving nothing in the system that caused any of this.
- Fresh diesel goes in, and then the system gets primed.
- We start it and check it runs properly on new diesel.
At that point it's ready to drive away. Permanent damage is very uncommon when it has been spotted quickly, and since all of this is done where the car is, it never needs to go to a garage.
AdBlue in a diesel tank around Langtoft is a separate job
If what was put in was AdBlue rather than petrol, the first step is unchanged — don't crank it — but the issue isn't. The lubrication a fuel system relies on gets stripped away by petrol, which thins your diesel. Urea in water, AdBlue, and in a diesel tank that causes rust and residue.
AdBlue removal in Langtoft has a page of its own with the full story on it, including why it is often the more significant of the two. We handle both.
Budgeting for a petrol-in-diesel drain in Langtoft
What moves the figure is set out below, since this job is not one job and our engineers cannot truthfully put a single number on this page.
- Started? Driven? Either answer counts more than anything else on this list.
- Wrong fuel in, against what your tank takes — that ratio.
- Which went in: petrol or AdBlue.
- Access: the car's position, and whether working on it there's sensible for our van.
Tell us what your car is, how much went in, and whether your engine has run. A straight answer comes back, not a range. For your car at home that is going nowhere and is not urgent, is fine too.
Things our engineers get about petrol in diesel in Langtoft
Can you do a fuel drain at a petrol station around Langtoft?
Much of what our technicians do happens nowhere else. So yes. Often, provided the site agrees: The Co-operative, plus every other forecourt nearby. Say on the phone where precisely you have stopped. Whether our engineers can work in that location is something our engineers answer there and then.
Is there a sensible amount of petrol in a diesel?
Whether the engine has run matters much more, though the ratio matters too, instead of the litres. Five litres into an almost dry tank is not five into a full one, no. But both land on the same query in the end: has that mixture been pulled right through, or has it not?
I drove the vehicle after putting petrol in my diesel. What next?
Stop somewhere sensible, turn off, then keep the car off. Not restarting it is the single most helpful thing available to you now. Driving does shift the trouble out of the tank and into your pump and injectors, yes, and it stays fixable a lot more commonly than motorists expect.
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 modification at all. A dispute over a warranty is likelier to come from running a diesel on petrol — so leave it turned off.
Can I just add two-stroke oil and drive home?
What petrol has diluted isn't put back by two-stroke oil, which is an old remedy for a different issue. So no. Later on? Still petrol in the tank, and a pump that has to live with the stuff.
Do I need a main dealer for petrol in a diesel?
Not at all. Our engineers drain and flush the vehicle wherever it is, so there's no need to bring it to a main dealer.
Still with your vehicle?
The motor remains off.
Already driven it? Then pull over somewhere sensible, turn off, and let the car stay that way. Cold, still, going nowhere: that's the best position to be in. People fear this much more than they need to.
Mobile fuel draining in Langtoft and across Lincolnshire — at the roadside, on the forecourt or at home.