Put Petrol in a Diesel Car in Port Talbot? Don't Start It
With that tank still holding the petrol and the motor not yet run, almost every job takes only a drain, so leave your engine off. That outcome is settled in the minutes immediately after the fill-up, rather than by the amount that got in. Across Port Talbot and the rest of Neath Port Talbot, Petrol in Diesel drains the vehicle and flushes it where it is, whether at a roadside, on a private drive or at a forecourt. Our technicians can tell you what the following move is. Phone — it comes before anything else.
Now what? Petrol in a diesel, step by step
- While you drive, the pump and your injectors wear down. This is why you never crank it, and why you never rely on it once it has started. The thing about petrol in a diesel in particular — the bit most people get wrong — is that it drives away happily for the first mile or two. Diesel in a petrol engine generally can't run at all, which stops the motorist and stops the damage with them. This one lets you carry on.
- Two things, diesel: it burns, and on the way through it keeps the injection pump and injectors lubricated. Petrol only handles the one. That is why the car's ignition is left off too — flick it on and you frequently prime the system, and that is petrol leaving your tank for exactly those components.
- That advice presumes a diesel fuel system accepts petrol by percentage. It will not. Add diesel on top and nothing at all is cleared; what you have is a bigger tank of the same blend. And no, the type makes no difference — super unleaded is just petrol.
- Stay still if it's sensible to. Hazards on, motor off, keep it. Wherever you have stopped — the verge on Station Road, anywhere — an odd place for us beats a started motor, and nothing is quicker for us to deal with than a motor that never shifted.
- Before you phone, gather your whereabouts. Anything nearest to you with a sign on it, plus a postcode beginning SA13 1 — that is what decides whether our van arrives or circles.
- Dial 0333 366 0103. Tell us what went in, approximately how much, and whether the car has started. These three facts settle your whole visit.
Nothing about the hours since has cost you anything. Fuel in a tank is dormant, so a diesel Volkswagen Golf parked at Port Talbot Parkway this morning is no worse at five than it was at nine — what sucked thinned diesel through the pump was the journey in. Ring us before you head off to fetch the car.
The awkward part is the bay, not the fuel. Vehicles either side of you, a trolley shelter behind, and occasionally a height bar on the way in that decides if a technician can reach you at all — so when you call from a car park like the one outside Tesco, tell us how much clearance there is about you and which way round the vehicle is. Those our engineers visit frequently. Should there be no room to work next to the diesel Skoda Octavia, it gets moved with the motor off, and not out of fuss over a couple of seconds of running: priming takes place at every start, more of the blend exits that tank for the pump, and two shunts into a nicer space have quietly made a harder job of what was merely a vehicle standing still.
Three replies settle most of the work: what was put in, roughly how much, and whether your engine has run since. We ask for those answers when we reach the vehicle in the car park by Forge Tavern. Then the tainted mix comes out of that tank, your lines are rinsed, and where your Ford Focus has a serviceable filter, it comes off. Once new diesel is in and the system primed, our technicians fire it up and make sure it runs correctly before you pull away.
Clattering, a lumpy idle, white smoke, a throttle gone limp. That is a misfuelled diesel Audi A3 telling you what is wrong. Switch off where you have stopped, by Eglwys Bedyddwyr Glan yr Afon or anywhere else, and do not start the vehicle to find a better spot.
That sluggishness is your fuel failing to build pressure correctly, not your engine packing up — and with no dashboard light for it, cars in that position normally get driven once more before somebody rings. Do not. A few streets is all it got: throttle gone dead, idle turned lumpy, and a diesel Vauxhall Astra now sitting close to Dementia Hwb. Switch the vehicle off then call us.
Can petrol be drained out of your diesel at a forecourt?
The job starts at a forecourt, mostly. Quite often the work finishes there too. If you're still at the forecourt at Tesco, that is normally where this drain gets done — our technicians work on station forecourts routinely, with the site's agreement.
Nowhere else except the forecourt can the mistake be spotted with your engine still unstarted. The few seconds between reading your receipt and reaching for your key determine how much needs flushing. Anywhere other than a forecourt — a car park, a private drive, a lay-by — your car was fired up and moved to get there, so fuel was sucked from that tank, through your filter and into your high-pressure pump. That means the fuel lines and the fuel filter require rinsing as well as that tank. It is not a calamity, and our technicians can still sort it out where the car is.
Roll the car out of the way if the attendants volunteer, and they generally will. The next driver gets by the petrol pump, and that is worth doing. Four car lengths is not worth the risk.
Do we cover your side of Port Talbot?
Being a coastal town, Port Talbot sees a routine visit, and its neighbours round about come along on that same journey: Velindre and Lletyharri, Corlannau and Pen-y-cae, Aberavon.
Not on the list? That means nothing. The places above are simply the nearest few, and nearly all towns around Neath Port Talbot have a page of their own somewhere on this site. Assuming is the mistake to skip, particularly on a border or anywhere your phone struggles. Ring us to ask.
This map is the ground this page spans. Your car doesn't need to move to us. We work across all of that — roadside, forecourts, driveways, car parks.
Stuck at the kerbside somewhere around Port Talbot?
Not everyone has the opportunity to pull over anywhere suitable. Set off, then realised? Landed by the verge on High Street, or parked in some lay-by with the hazard lights flashing? That is a routine call here. Not an odd one.
Fine where you are? Remain by it. Not safe? Step out and clear of it. Don't start it up to get to a better spot. It'll go — a diesel on petrol usually obliges — and each mile of obliging pulls that blend deeper into the fuel system. Pressing on causes the vehicle far more harm than our van coming out to an inconvenient location, and that's no bother for us.
Driven it already? Pull in, and see below
Here is where the M4 comes in — under a mile away from Port Talbot. Lost power, an uneven idle, some smoke: those are the symptoms when they appear, instead of a clean stop — and a wrongly fuelled diesel will often get you onto it and some way along before anything seems wrong at all.
Don't start it to reposition. Come off at the first sensible junction then switch off. On a longer trip — anything approaching the under 10 miles to the nearest city — assume the petrol has been through the filter, the pump and your injectors, and say so when you call. It affects what our engineers bring.
About Port Talbot
Port Talbot is a coastal town in south Wales, situated near the mouth of the Afan River and looking out over Swansea Bay. Port Talbot has a mix of industrial and residential areas, with terraced housing being a predominant feature of the town. Port Talbot is close to several nearby villages, including Velindre and Lletyharri, and is within commuting distance of Swansea, the nearest city. Port Talbot sits at a relatively low elevation of around 12 metres above sea level, making it a coastal lowland town.
What we do when we reach you around Port Talbot
- Our technicians check what was put in, how much, and whether the motor has run. The answers alter the work, which is why we ask before giving a price.
- The tainted mixture comes from that tank.
- Our technicians clean the lines and clear your filter, and so what's remaining in your system is not what created the trouble.
- Your system gets bled, on new diesel.
- The engine is started and tested to make sure it runs properly on clean diesel.
The vehicle is then ready for you to pull away. All of it is done where your car is, so it never has to go to a garage, and when it has been noticed early, permanent damage is very uncommon.
A different job: AdBlue in a diesel tank around Port Talbot
The fault isn't the same, though the opening step is — do not start it — if what got in was AdBlue instead of petrol. Diluted diesel, and no lubrication left for the fuel system that depends on it. That is petrol. AdBlue is urea dissolved in water, and in a diesel tank it causes corrosion and build-up instead.
Our technicians handle both, and AdBlue removal in Port Talbot has its own page with the details — including why it's frequently the more significant of the two.
How much is a petrol-in-diesel fuel drain in Port Talbot?
What moves the figure is listed below, since this job isn't one job and we cannot frankly put a single price on this page.
- This is the key one: whether the engine has been started, or driven.
- Wrong fuel in, against what your tank holds — that proportion.
- AdBlue or unleaded, whichever went in.
- Access: the car's position, and if working on it there's sensible for a technician.
A straight answer instead of a range is what you get for telling us three things: the car, the quantity, and if it has run. Not pressing, with the vehicle at home and going nowhere? Then does this job.
Port Talbot motorists ask us these about petrol in diesel
Can you do a fuel drain at a petrol station in Port Talbot?
Yes, and it's where a good part of this work gets done. Often, provided the site consents: another forecourt nearby, plus every other forecourt nearby. Say on the phone where exactly you have stopped. Whether our technicians can work in that place is something our technicians answer on the spot.
Is there a sensible amount of petrol in a diesel?
Proportion settles it instead of litres — and more than either, whether your engine has run. What settles how much work is needed is if that blend has been drawn through the fuel system — because even though five litres in an almost empty tank is a separate matter from five in a full one, either way that is the question.
I put petrol in my diesel and drove the car. What now?
Stop safely. Off. Nothing after that. It is salvageable a lot more often than drivers fear, even though driving is what shifts the trouble from the tank into the pump and injectors — and the single most valuable thing you can do now isn't restart it.
Is a fuel drain going to void my warranty?
It is not a modification, so a drain then flush carried out properly does not void a manufacturer's warranty. What is likelier to start a dispute is a diesel that has been run on petrol. One more reason for your engine to remain off.
Two-stroke oil in your tank, and then home?
No. Two-stroke oil is an old fix for a different problem and it doesn't restore what petrol has thinned. Petrol remains in that tank afterwards, whatever else goes in, and the pump gets no reprieve from it.
Main dealers and petrol in a diesel
There's no need to take it to a main dealer, because our technicians drain and flush the car wherever it is.
You, and the vehicle, still together?
Don't turn the car back on.
If you have already driven it, pull in somewhere safe, switch it off then leave it off. Cold, stationary, going nowhere: that is the best place to be in. Motorists fear this much more than they need to.
At the roadside, on the forecourt or at home — mobile fuel draining around Port Talbot and across Neath Port Talbot.