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Petrol in Diesel

0333 366 0103

Put Petrol in a Diesel Car in Dovecote?

If you have not turned on the motor as yet, do not. A fuel drain and nothing else is almost always what a car needs while the fuel is still in your tank and your engine has not yet been started, which is why it's the coming few minutes that count, not how much was put in. Petrol in Diesel travels to your car wherever it has come to rest in Dovecote or the rest of East Lothian, on the forecourt, by the roadside or on a drive, and drains and cleans it there. Our engineers shall tell you what the following part will be. Call us — it goes before all else.

Call 0333 366 0103

What now? Petrol in a diesel, step by step

  • While you drive, your pump and the injectors suffer. That is why you don't start the car, and why you don't believe it once it has started. The catch about petrol in a diesel specifically — the part drivers get wrong — is that it pulls away happily for the first mile or two. Diesel in a petrol engine generally cannot run at all, which stops the driver and stops the wear with them. This one lets you drive on.
  • Leave the ignition be too. Diesel has two roles: it combusts, and before it combusts it lubricates that high-pressure pump and its injectors. Petrol handles the first and not the second. Switching the car's ignition on is commonly sufficient to prime that system, which pulls that petrol out of that tank and into just those parts.
  • Topping up clears nothing. It hands you a bigger tank of the same mixture, because a diesel fuel system will not tolerate petrol by percentage in the way that guidance implies — so never pour diesel on top to water down it. Grade is immaterial too: super unleaded is petrol.
  • A vehicle that has not moved is the quickest one to handle, and so wait where you are if you reasonably can. Parked on the verge on Buchanan Avenue? Hazards on, then keep the vehicle there. An awkward place works for us better than a started motor.
  • The van arriving instead of circling depends on two things: a postcode beginning EH41 4, and whatever is nearest to you with a label on it. Get both prepared before you call.
  • Dial 0333 366 0103. Anticipate three queries — what was put in, approximately how much, and whether your car has been run. Those answers settle everything that happens next.

At a forecourt: draining petrol from a diesel

A big chunk of this job gets finished at a forecourt, as that is where it usually starts. If you are still on the forecourt at Shell, that's usually where this drain gets done — our technicians work on station forecourts regularly, with the site's agreement.

At the forecourt, the mistake is stopped with the engine never started, and nowhere else does it. Anywhere else — a car park, a drive, a lay-by — the vehicle was started and moved to get there, which means fuel was drawn from that tank, through your filter then into the high-pressure pump. That is not a disaster, and we can still put it right where it is. It does mean the lines and the filter need rinsing as well as the tank, and that's determined by the few seconds between reading the till receipt and reaching for the keys.

The attendants will usually help you roll the vehicle away from the petrol pump so the next driver can get by. That is worth doing. Cranking the car over four car lengths? No.

Mobile fuel drain van at a diesel car in Dovecote

Service near Dovecote

The same trips bring us to Black House Steading, Haddington, Hailes Terrace, Nungate and Samuelston as well as Dovecote, which is a small village.

Not on that list? That tells you nothing. The names above are just the closest few, and most locations across East Lothian have a page of their own somewhere on our site. Presuming is the mistake to skip, especially on a boundary or somewhere the satnav struggles. Phone to enquire.

Check the map for the patch included on this page. Our technicians work roadside, on forecourts, on driveways and at car parks across all of it, and your vehicle doesn't need to move to us.

Stranded at the roadside somewhere around Dovecote?

Not everyone gets the chance to pull in somewhere suitable. Set off, then noticed? Ended up along the verge beside A6093, or parked in some lay-by with the hazard lights going? That's a common call here. Not an unusual one.

Fine there? Sit with it. Not fine? Move out and away from it. Do not fire up the engine to nurse the vehicle somewhere better — a diesel running on petrol will usually oblige, and every mile it obliges for is pulling the mix further into the system. Carrying on does the car far more harm than a van driving out to an inconvenient place, and that is no trouble for us.

You drive off at the end, once our technicians have started the car and made sure it runs smoothly on fresh diesel, with the system primed. Before that, in the car park at The Plough Tavern Hotel, the contaminated fuel comes out of the tank, the fuel lines get flushed and the fuel filter comes off where your Dacia Duster has a replaceable one. It all begins with three questions when our engineers get to your car: what went in, how much of it, and whether it has been fired up since.

Diesel has to be thick enough to seal the precision parts it passes through, and petrol dilutes it. That's the whole process, and it explains the normal Backburn Wood call: a diesel Mercedes E-Class that drove out there without fuss and came back down on power, lumpy at idle, possibly 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 your fuel dilutes, pressure that should build then stay built starts leaking past gaps instead, and your engine gets a weaker, later, less even delivery than it was designed around. None of that is the engine failing, which is the part worth hearing: it's the fuel no longer acting like diesel, and it stops when your fuel is sorted.

Clearing your BMW 5 Series, changing your filter where there is a serviceable one, flushing your lines, putting fresh fuel through the full system: that is this job, and it's shaped by the worst of that waiting in the lines instead of in your tank by this point. Three things help when you call from close to 2nd Haddington Scout Group — which side the filler is on, whether our van can park next to without blocking the road, and whether the motor has run since you filled up. On-street is the commonest spot our technicians work, so the place itself is rarely the problem. A tight parking spot is better than a motor driven somewhere more handy.

A throttle gone dead, white smoke, a ragged idle, rattling: that's a wrongly fuelled diesel Audi A6 telling you what is wrong. Never start the car to find a better spot — turn off where you have stopped, near Burns Family Well or anywhere else.

That deadness is the fuel failing to build pressure fully, not the engine packing up — and with no warning for it, vehicles in that position usually get driven a second time before anyone phones. Please don't. A few streets is all it got: throttle gone soft, idle turned ragged, and a diesel Vauxhall Insignia now sitting by Robert Ferguson of Raith Memorial. Switch it off and call us.

Petrol in a diesel, but your car has rolled

Here is where the local M8 comes in — under 25 miles from Dovecote. Some distance along, and onto it in the first place: a misfuelled diesel will usually do both before anything feels wrong. What you get then is rarely a clean stop. Power ebbs away, the idle turns lumpy, and there may be some smoke.

Pull off at the first safe exit, turn off, and don't restart it to reposition. On a longer run — anything close to the under 25 miles to the closest city — assume the mixture has been through the filter, the pump and your injectors, and tell us when you call. It affects what our technicians bring.

About Dovecote

Dovecote is a locality situated on the riverside in East Lothian, with an elevation of 58 metres, and is located near the town of Haddington. Dovecote lies approximately 15 miles east of Edinburgh, Scotland's capital city, and is part of the wider East Lothian area. Dovecote has a mix of housing types, but detached homes are the most common, and its population is around 1793 residents. Dovecote is close to other nearby places such as Black House Steading and Hailes Terrace.

The job in Dovecote, step by step

  • The answers shape the work, which is why our technicians ask before quoting: what was put in, how much of it, and if your engine has run.
  • That tank is emptied of it.
  • Fuel lines are rinsed through and the filter cleared, leaving nothing in the system that caused any of this.
  • The fuel system gets primed, on new diesel.
  • Your engine is started and tested to be sure it runs correctly on new diesel.

The car is then ready for you to drive away. Our engineers do all of it wherever the vehicle has ended up, which means it never needs to be taken to a garage, and when it has been caught early, it is very rare for there to be permanent damage.

A distinct job: AdBlue in a diesel tank around Dovecote

The fault isn't the same, though the first rule is — do not start it — if what went in was AdBlue instead of petrol. Weakened diesel, and no protection left for your fuel system that depends on it. That's petrol. Corrosion and deposits are what a diesel tank gets instead, as AdBlue is urea in water.

AdBlue removal in Dovecote has a page of its own with the details on it, including why it is frequently the more significant of the two. Our technicians deal with both.

Budgeting for a petrol-in-diesel fuel drain around Dovecote

One number would not be honest here, because this is not one job. These are the things that move it:

  • This is the main one: whether your engine has been started, or driven.
  • How much of the wrong fuel was put in, measured against how much that tank takes.
  • Which got in: unleaded or AdBlue.
  • Access: the vehicle's position, and if working on it there is sensible for a technician.

The car, the quantity, whether it has run — give us those and the answer comes back clear and not as a range. If it's not pressing — the vehicle is at home and going nowhere — is fine too.

Petrol in diesel queries from Dovecote drivers

At a petrol station in Dovecote, can you do a fuel drain there?

Plenty of what we do happens nowhere else. So yes. Tell us which one you're at when you call and we will tell you if our technicians can work there. With the station's agreement our engineers visit JET and the other forecourts around town regularly.

How much petrol in a diesel is too much?

Proportion decides it rather than litres — and more than either, whether your 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 needed is if that mix has been sucked through your fuel system.

I put petrol in my diesel and drove the car. What next?

Stop sensibly. Off. Nothing after that. It is recoverable much more frequently than people fear, even though driving is what shifts the issue from that tank into your pump and injectors — and the single most helpful thing you can do now is not restart it.

My warranty — does a fuel drain void it?

A manufacturer's warranty withstands a drain and flush done to a correct standard, which is no alteration at all. What is likelier to start a disagreement is a diesel that has been run on petrol. One more reason for the motor to stay off.

Adding two-stroke oil, then driving home

No. Two-stroke oil is an old fix for a separate fault and it does not restore what petrol has weakened. Petrol remains in that tank later, whatever else goes in, and your pump gets no respite from it.

A main dealer for petrol in a diesel — necessary?

No. Our engineers drain and flush the vehicle wherever it is, so there's no need to bring it to a main dealer.

Is the car still with you?

Never switch the engine on again.

If you have already driven it, pull over somewhere sensible, switch it off and leave it off. Cold and stationary, a car is in the best place available — and motorists fear this a lot more than the recovery rate warrants.

Call-out fuel draining in Dovecote and throughout East Lothian — at the kerbside, on the forecourt or at home.

Call 0333 366 0103