Skip to content

Petrol in Diesel

0333 366 0103

Petrol in a Diesel Car in Halford

With the tank still carrying the petrol and the engine not yet turned over, almost every job needs only a drain, so keep the motor off. That outcome is settled in the minutes immediately after filling up, rather than by the amount that got in. Throughout Halford and the rest of Shropshire, Petrol in Diesel drains your car and cleans it where it sits, whether at a roadside, on a private drive or at a forecourt. Phone before anything else starts, so you'll see what comes after that.

Call 0333 366 0103

What to try first about petrol in a diesel

  • Do not fire it up — and do not rely on it when it starts. This is the thing motorists have wrong about petrol in a diesel specifically. A petrol motor fed diesel usually just won't run, and so the person stops and the damage stops with them. A diesel filled with petrol normally starts, idles and drives away perfectly well for a few miles. It's not okay. It is wearing your fuel system whenever you drive.
  • Diesel burns, and before it ignites it greases — that high-pressure fuel pump, those injectors. Petrol does only the burning. So leave the ignition alone too: turning it on is usually sufficient to prime your system, and priming draws petrol from your tank into just those components.
  • Topping up clears nothing. It hands you a fuller tank of the same blend, since a diesel fuel system does not handle petrol by percentage in the way that advice suggests — so don't put diesel on top to weaken it. Grade is immaterial too: super unleaded is petrol.
  • A car that hasn't shifted is the easiest one to sort, so wait where you are if you sensibly can. Pulled up on the verge on B4368? Hazards on, then keep it there. A difficult location works for us better than a started engine.
  • Find out where you are before ringing. A postcode beginning SY7 9, and the name of whatever is next to you. Otherwise the technician circles rather than arriving.
  • Call 0333 366 0103. Say what went in, approximately how much, plus if the car has started. Those three replies decide the entire visit.

Can petrol be taken out of a diesel at a forecourt?

Forecourts are where this work usually begins, and where a fair chunk of that ends. Still at Texaco? Then that is typically where it gets done. Garage forecourts are routine for us, with the agreement of the station.

Before the engine has started — a garage is the only place it ends up spotted. Fuel pulled out of that tank and through your filter, all the way to the high-pressure fuel pump, is what occurs when the motor is switched on and your car is moved to where it is now: the car park, the driveway or the lay-by, anywhere other than the forecourt. So the flush takes in the fuel filter and the fuel lines as well as that tank. That's still not a catastrophe, and we put it right where the vehicle stands. What decides it is whether the ignition was reached for in the seconds after your receipt was checked.

Roll the car out of the way if the attendants suggest it, and they generally will. The next motorist gets past the pump, and that's worth doing. Shifting the car four bays does not merit cranking the engine.

Mobile fuel drain van at a diesel car in Halford

Coverage near Halford

Newton, Craven Arms, Whettleton, Newington, Stokesay — each of these on our journeys that carry us across to Halford itself, a village.

Not on that list? That means nothing. The names above are simply the nearest few, and the majority of places around Shropshire have a page of their own somewhere on the site. Phone to check instead of assuming, particularly when you're on a border or somewhere a satnav can't find.

The map outlines the area this page covers. Roadside, forecourt, driveway, car park: all of it is ground our engineers work on, and none of that needs the car to travel to us.

Your diesel Peugeot 308 will have felt perfectly normal on the way back from Stokesay Primary School. They all do, and that's the trap with petrol in a diesel instead of the other way round. Put diesel in a petrol motor and it usually won't run, so the person stops and the harm stops with them. Put petrol in a diesel and it fires up, idles and pulls away as though nothing has happened — all the while your high-pressure pump works without the protection the fuel is meant to be giving. Nothing tells you, as from behind the wheel there's nothing to warn you about. Phone with about how far you travelled and how hard you drove it; the second answer counts more than the first.

Park it there overnight. Phone in the morning. Nothing about a diesel Nissan Qashqai parked in the parking area outside Stables deteriorates as it sits, tank of petrol or not, and the job stays a straightforward one right up until the moment it gets driven home. The question our engineers arrive with is about that run there: a cold engine over a short distance is where petrol ignites least well, and whatever fails to burn can find its way past the piston rings into the oil.

None of it is your engine failing. That's the part worth hearing, and it is why the ordinary Craven Arms Playing Fields call ends better than it sounds: a diesel Ford Focus drives out there without a murmur, comes back with the power gone, the idle lumpy and maybe a little smoke, and the cause is your fuel no longer acting like diesel. Diesel has to be viscous enough to seal the close-fitting components it passes through; petrol dilutes it; and a diesel injection system is hydraulic as much as chemical, needing the fuel to hold pressure instead of only to burn. So pressure that should build and stay built escapes past clearances, delivery shows up poorer and later and less even than engineered, and all of that stops once the fuel is put right.

About as well as this goes, once your engine has turned: away from the pumps, receipt read, and the diesel Mercedes C-Class left by Land of Lost Content barely two streets on. Ring us, and leave it off. A short distance does really help. It was still a start and still a drive, though, so the filter and the pump have had weakened fuel through them — hence cleaning the fuel lines rather than only draining your tank.

Clattering? Uneven idle? White smoke, throttle gone soft? That's your wrongly fuelled Audi A3, a diesel, saying what is wrong with it. Stop wherever you happen to be, possibly by St. Andrew's, and leave the restarting alone.

Kerbside breakdowns around Halford

The chance to stop somewhere suitable does not come to everybody. Hazards going at a lay-by somewhere, or pulled onto the verge on Halford Meadow since you noticed after setting off — our engineers take that call often enough that it's the ordinary kind.

Sit beside your car if it is sensible to sit in it, yet out of it if it's not. Every mile a diesel obliges you for on petrol pulls the mixture further into the fuel system — and oblige it frequently will, which is why your motor doesn't get restarted to limp somewhere safer. However difficult the place, it is no bother for us to get to it, and that's much better for the car than pressing on.

Run it already? Pull in, then check this

This is where the M54 comes into it — under 25 miles away from Halford. Some distance along, and onto it in the first place: a misfuelled diesel will often manage both before anything seems wrong. What you get then is rarely a tidy stop. Power falls away, your idle turns lumpy, and there may be smoke.

Pull off at the next sensible exit, switch off, and never start the vehicle to reposition. On a longer run — anything approaching the under 50 miles to the nearest city — take it the contamination has been through the fuel filter, the pump and your injectors, and mention it when you ring. It changes what we bring.

All about Halford

Halford is a small village in Shropshire, situated on the banks of a river at an elevation of around 122 metres. Halford lies near the market towns of Craven Arms and Ludlow, and is close to the villages of Newton and Whettleton. Halford has a population of approximately 599 people, living in predominantly semi-detached housing. Halford is located about 27 miles from Hereford and 131.8 miles from London.

What our technicians do when we arrive with you around Halford

  • The responses shape the work, which is why our engineers ask before giving a price: what was put in, how much of that, and if the engine has run.
  • The polluted mixture comes out of the tank.
  • What is left in the fuel system should not be what started the trouble, and so the lines get flushed and the fuel filter cleared.
  • Our technicians put new diesel in and prime your system.
  • Once it's turned on, we confirm it runs correctly on clean diesel.

At that point it's ready to drive away. All of it is done where the car is, so it never has to go to a garage, and when it has been noticed early, lasting damage is very uncommon.

AdBlue in the diesel tank by mistake, in Halford?

If what went in was AdBlue instead of petrol, the first step is the same — don't start the car — yet the problem isn't. Petrol thins the diesel and strips the protection your fuel system depends on. Urea in water, AdBlue, and in a diesel tank that causes corrosion and residue.

Both are ours. There's a separate Halford page for AdBlue removal, with the full story on it — including the reasons it frequently turns out to be the worse of the two.

Paying for a petrol-in-diesel drain in Halford

One price wouldn't be fair here, because this is not one job. These are the things that move it:

  • This is the big one: whether your motor has been started, or driven.
  • How much of the wrong fuel went in, weighed against how much your tank takes.
  • AdBlue or petrol, whichever was put in.
  • Access: the car's position, and whether working on it there is safe for a van.

Tell us your car, the amount and whether it has run, and you'll get a clear answer instead of a range. For the vehicle at home that is going nowhere and is not urgent, works too.

Halford drivers ask us these about petrol in diesel

At a petrol station around Halford, can you do a fuel drain there?

Yes, and it's where a large share of this work gets done. Regularly, provided the site agrees: Gulf, plus every other forecourt nearby. Say on the phone where precisely you have stopped. Whether our technicians can work in that location is something our engineers answer on the spot.

How much petrol in a diesel is too much?

It depends on the ratio instead of the litres, and far more on whether the motor has run. Five litres in an almost empty tank is a separate situation from five in a full one — but either way, the thing that decides how much work is required is whether that mixture has been drawn through the system.

I drove the vehicle after putting petrol in my diesel. What now?

Stop safely. Off. Nothing after that. Driving moves the issue along — out of your tank, into the pump and injectors. Drivers fear it a good deal more than the recovery rate warrants, mind. The one genuinely helpful thing left to you isn't restarting the vehicle.

Will a fuel drain void my warranty?

It is not a modification, and so a drain and flush carried out properly does not void a manufacturer's warranty. Another good reason to leave it switched off: running a diesel on petrol is the thing more likely to cause a disagreement with one.

Could I put some two-stroke in and just drive?

No. Two-stroke oil is an old remedy for a distinct problem and it does not replace what petrol has diluted. Your pump still has to put up with it, since the tank still has petrol in it afterwards.

Do I need a main dealer for petrol in a diesel?

You do not need one. The vehicle is drained and cleaned wherever it is, with no need to bring it to a main dealer.

You, and the car, still together?

Keep the engine turned off.

Switch it off somewhere sensible then keep it off, if you have already driven it. This is recoverable from much more frequently than drivers expect, and a stationary, cold vehicle is the best position to be in.

Call-out fuel draining around Halford and throughout Shropshire — at the roadside, on the forecourt or at home.

Call 0333 366 0103