Put Petrol in a Diesel Car in Morfa?
With your tank still carrying the petrol and your engine not yet started, almost every job requires only a drain, so keep the motor off. That result is decided in the minutes immediately after filling up, and not by the amount that was put in. Throughout Morfa and the rest of Carmarthenshire, Petrol in Diesel drains the car and flushes it where it stands, whether at a roadside, on a drive or at a forecourt. Contact us before anything else starts, and you will hear what comes from there.
The next five steps: petrol in a diesel
- Feed a petrol engine diesel and it will usually not run at all, so the motorist stops there and so does the wear. Give a diesel petrol and the car starts, it ticks over, it moves off — all right for several miles. People have that backwards, which is the thing they get wrong about petrol in a diesel specifically. So never start it. And having started, do not believe it: your fuel system is wearing as you drive.
- Two things, diesel: it ignites, and on the way through it keeps the injection pump and injectors greased. Petrol only handles the one. That is why your ignition stays off also — flick it on and you commonly prime that system, and that is petrol exiting that tank for precisely those parts.
- That guidance assumes a diesel fuel system copes with petrol by percentage. It doesn't. Add diesel on top and nothing at all is cleared; what you get is a larger tank of the same mixture. And no, the grade makes no difference — super unleaded is simply petrol.
- A motor that has not moved is the easiest one to deal with, and so remain where you are if you sensibly can. Parked on the verge on Black Lion Road? Hazards on, then keep the car there. A difficult spot works for us better than a started motor.
- Find out where you are before phoning. A postcode starting SA14 6, and the name of whatever is closest to you. Otherwise the van circles rather than arriving.
- Call 0333 366 0103. Let us know what went in, about how many litres, plus if the motor has fired. These three facts determine the entire visit.
Pump-side drains for petrol in a diesel
A good share of this work gets completed at the pump, since that's where it often starts. Still at Texaco? Then that's normally where it takes place. Petrol station forecourts are routine for us, with the consent of the owner.
Before the engine has started — a forecourt is the one setting the mistake is halted. Everywhere else — a car park, a drive, a lay-by — your car was switched on and driven to get there, which means fuel was drawn from your tank, through the filter and into your high-pressure pump. That's not a calamity, and we can still deal with it where it sits. It does mean the fuel lines and your filter need cleaning as well as your tank, and that's decided by the few seconds between reading the receipt and reaching for the keys.
The attendants will usually happily move it away from the petrol pump so the next driver can get by. It is worth doing. Four vehicle lengths isn't worth a start.
The call our technicians hope for sounds like this: diesel Renault Megane, a couple of litres of unleaded, run a couple of miles, now shut off at Aldi. What we are truly asking is how much fuel the pump has drawn — not how long ago it was.
Shift the vehicle out of the gateway and sort it out later — that's what someone will say, and it is wrong. Parked on the zig-zags by the local primary school, a wrongly fuelled diesel Audi A4 is a nuisance and nothing worse. Fired up three more times for good manners, it is no longer a tank fault but a fuel system one, since priming happens with every start and more petrol goes through the filter on to your pump. Let people grumble. Ring us.
A diesel Mercedes C-Class in the parking area by The Phoenix carrying a tank full of petrol in it is an easy job, right up until somebody takes it home. Leave the car there overnight then call us in the morning. Nothing deteriorates as it sits. What our technicians will ask is if the run there was short and chilly, as that's where petrol is least likely to burn correctly — and anything that won't burn can get past the piston rings then into the sump.
About as well as this goes, once your engine has turned: away from the pumps, receipt read, and the diesel BMW X3 left by Leekes scarcely two streets on. Ring us, and leave it off. A short distance does truly help. It was still a start and still a drive, though, so the fuel filter and the pump have had thinned fuel through them — hence rinsing your lines instead of only clearing your tank.
That sluggishness is your fuel failing to build pressure correctly, not the motor packing up — and with no warning for it, motors in that position usually get driven once more before anyone calls. Do not. A couple of streets is all it got: throttle gone soft, idle turned lumpy, and a diesel Dacia Sandero now waiting near Mynydd Sion Independant Chapel. Switch the vehicle off then call us.
Do our technicians reach your corner of Morfa?
These same runs bring us to Gors-goch, Pen-y-groes, Gorslas, Cross Hands and The Gate besides Morfa, which is a rural village.
Our engineers do come. The names above are merely the immediate neighbours, and a page is there for the majority of towns in Carmarthenshire, so an absence from the list is not an absence from the coverage. Ring us to check instead of assuming, particularly where you're on a border or anywhere a satnav misreads.
The patch this page covers appears on the map. We work at the roadside, at forecourts, on driveways and in car parks throughout all of that, and your vehicle does not need to come to us.
Morfa: broken down wherever you stopped
Some people find no safe spot to stop at all. If you realised after setting off and ended up by the verge on Clos Emily, or in a lay-by somewhere with the hazards flashing, that is a routine call for us instead of an unusual one.
Whether you wait beside the car or step away from it turns on whether staying in it is safe. Never fire up the engine to nurse the car somewhere better — a diesel running on petrol will often oblige, and every mile it obliges for is dragging the blend further into the fuel system. A van driving to a tricky location is no trouble for us, and it is a lot better for your car than driving on.
A few miles on petrol in a diesel: what next?
The local M4 is the one that matters here, and runs under 5 miles from Morfa. A drop in power, an uneven idle, smoke: those are the symptoms when they come, rather than a clean stop — and a wrongly fuelled diesel will frequently get you onto it and some distance along before anything seems wrong at all.
Do not restart it to move it. Come off at the next sensible junction and turn off. Suppose the worst of it on a long trip. Anything close to the under 15 miles to the nearest city, and the petrol has been through your filter, through your pump, through the injectors. Say so when you phone. What we bring alters.
A little about Morfa
Morfa is a small village in Carmarthenshire, situated inland at an elevation of around 169 metres. Morfa lies approximately 13 miles north of Swansea and is surrounded by nearby villages such as Gors-goch and Pen-y-groes. Morfa has a population of around 838 people and is characterised by predominantly detached housing. Morfa is located in a rural area, with the nearest major city being Swansea.
What comes next when we arrive with you in Morfa
- Our technicians find out what went in, how much, and whether your engine has run. The replies shape the work, which is why our engineers ask before quoting.
- Our technicians clear that tank of all the polluted fuel.
- What is left in the system should not be what created the issue, and so the fuel lines get cleaned and the fuel filter cleaned.
- We put clean diesel in and bleed the fuel system.
- Our technicians turn it on and confirm it runs smoothly on clean diesel.
After that it's ready to drive away. Long-term damage is very unusual when it has been noticed soon, and since all of this is done where the vehicle is, it never needs to be taken to a workshop.
A different problem: AdBlue in a diesel tank around Morfa
AdBlue instead of petrol? Then the opening instruction is unchanged — the engine remains off — whereas this issue under it's a different one altogether. Petrol thins the diesel and takes away the lubrication the fuel system depends on. AdBlue? Urea dissolved in water. Put that in with the diesel and you get corrosion instead, plus deposits.
Usually the more serious of the two, AdBlue — and the details lives on its own Morfa page. Both are ours to handle.
What a petrol-in-diesel fuel drain will cost in Morfa
We can't put one number on this page truthfully, as the job isn't one job. What changes it:
- Whether your engine has been run or driven. This is the big one.
- How much of the wrong fuel was put in, against how much your tank can hold.
- The sort of liquid in the tank, unleaded or AdBlue.
- Where your vehicle is, and if our van can sensibly get to and work on it.
A straight answer rather than a range is what you get for telling us three things: your car, the quantity, and if it has run. For your car at home that is going nowhere and isn't pressing, is fine too.
Things our technicians hear about petrol in diesel around Morfa
At a petrol station in Morfa, can you do a fuel drain there?
Yes — forecourts are where a good part of this takes place. Tell us which one you are at when you phone and we will tell you if our technicians can work there. With the owner's consent we visit Esso and the other forecourts nearby regularly.
How much petrol is too much for a diesel?
Whether the motor has run counts far more, though the ratio matters too, rather than the litres. Five litres in an almost empty tank is a separate case from five in a full one — but either way, the thing that decides how much work is needed is whether that mix has been sucked through the fuel system.
I drove the vehicle after putting petrol in my diesel. What next?
Stop safely. Off. Nothing after that. Driving shifts the issue along — out of the tank, into the pump and injectors. Motorists fear it a good deal more than the recovery rate warrants, mind. The one really helpful thing left to you is not restarting the vehicle.
Fuel drains and manufacturer warranties
It isn't an alteration, and so a drain then flush carried out properly does not cancel a manufacturer's warranty. An argument over a warranty is likelier to come from running a diesel on petrol — so leave it switched off.
Could I put some two-stroke in and just drive?
No. It belongs to a different fault from a bygone era, and petrol has weakened something no oil of that kind restores. Your pump still has to cope with it, as your tank still has petrol in it later.
A main dealer for petrol in a diesel — necessary?
There is no need to bring it to a franchised dealer, since we drain and flush the car wherever it is.
Is your car still with you?
Shut off is how it remains.
Already driven it? Then pull in somewhere safe, switch off, then let it stay that way. Cold, stationary, going nowhere: that's the best place to be in. People fear this much more than they need to.
Draining misfilled motors, Morfa and the rest of Carmarthenshire, wherever they are. Roadside. Forecourt. Home.