Put Petrol in a Diesel Car in New Town?
Never start the motor. While the petrol is still inside that tank and your engine has not been started, a fuel drain is almost always all it requires — and that is decided in the following few minutes, not by how much got in. Petrol in Diesel drains and flushes wrongly fuelled vehicles where they stand, all over New Town and the rest of Wiltshire, on the forecourt, at the roadside or on a drive. Just one call our way will be enough: we shall explain what comes after this. Make that first.
Petrol in a diesel: what to do now
- Give a petrol motor diesel and it will usually refuse to run at all, and so the driver stops there and so does the wear. Feed a diesel petrol and the engine starts, it ticks over, it moves off — all right for a few miles. Drivers have that reversed, which is the thing they get wrong about petrol in a diesel in particular. So don't start it. And once started, do not depend on it: that fuel system is wearing down whenever you drive.
- Flicking your ignition on usually primes your system, and priming is what carries petrol out of your tank and into the pump and injectors. Those are the parts diesel keeps lubricated on its way through, before it ignites. Petrol does the burning and none of the protecting. Leave the car's ignition be.
- That guidance supposes a diesel fuel system tolerates petrol by percentage. It will not. Pour diesel on top and nothing at all is removed; what you end with is a bigger tank of the same mixture. And no, the type makes no difference — super unleaded is still petrol.
- We would much rather drive to a difficult location than have it started — so if you sensibly can, sit tight. Nothing is simpler to sort than a motor that hasn't shifted. On the verge on Fleet Street, that means hazards on then leave the car.
- Keep your whereabouts prepared before you ring. A postcode starting SN1 1 and whatever is next to you with a sign on it is the difference between our van showing up and the van circling.
- What was put in, roughly how many litres, plus if the car has started — those three answers shape your whole visit. Ring 0333 366 0103 then tell us.
Quarter past eight, a hurried top-up on the road in, and the penny drops somewhere around eleven — by that point your diesel Volkswagen Golf has been parked outside Swindon for three hours. Phone us and keep it just where it is. The journey in is the thing that counts here, since diesel does two jobs on its way through a motor: it ignites, and before it burns it protects that high-pressure pump and its injectors. Petrol manages the first and not the second. So those couple of miles were travelled with the pump labouring on a fluid that had shed a lot of the protection it is designed around — which is why the question our engineers ask is how many miles you went, not how long your car has been stood.
Nothing alerts you, as from the driver's seat there is nothing to be warned about. The diesel Peugeot 3008 will have felt entirely normal on the way back from Holy Rood Catholic Primary School, and they all do — which is the snag with petrol in a diesel rather than the reverse. Diesel in a petrol vehicle generally refuses to run, stopping the motorist and stopping the damage with them. Petrol in a diesel fires up, idles, moves off as though nothing had happened, and all the while your pump does its work without the lubrication its fuel is supposed to supply. Tell us roughly how far, and how hard. The harder counts more.
Out there fine, back gutless. If that was the drive to Spring Gardens, look at your tank. Diesel gets thinned by petrol, and thin fuel seeps past the tight clearances supposed to build injection pressure — so every additional mile your diesel BMW 5 Series covered, the less pressure it held onto. Somewhere safe, turn off, call us.
A throttle gone dead, white smoke, a lumpy idle, rattling: that is a misfuelled diesel Kia Sportage telling you what's wrong. Never restart it to find a better location — switch off where you have stopped, by Swindon Hub or anywhere else.
A person certain will tell you to drain the car and put clean diesel in. Half true, that. Try it on a diesel Ford Fiesta near Sir Daniel Gooch Place and the motor will start — which is exactly why it sounds like sense. Here's the trouble: there's petrol left in the fuel filter and the feed lines, and the first thing your engine does is draw it back through your pump again. Draining a tank achieves nothing about fuel that already left the tank. Phone us. Your circuit gets rinsed, your filter comes off where there's one worth removing, and that's what separates a fixed vehicle from one that just starts.
On a forecourt: removing petrol from a diesel
Plenty of the work begins at a pump, which means a big chunk of it ends up finished there. The drain usually takes place there and then. Still on the forecourt at Applegreen? Given the station's agreement, that's a spot we work, and often.
At the forecourt, the mistake gets stopped with your engine never started, and nowhere else does that. Everywhere else — a car park, a private drive, a lay-by — the car was started and moved to get there, which means fuel was drawn from your tank, through the filter then into the high-pressure fuel pump. That is not a calamity, and our technicians can still sort it out where it sits. It does mean the lines and the fuel filter need cleaning as well as your tank, and that's determined by the few seconds between checking your receipt and going for your key.
Staff will usually pitch in pushing it clear of the petrol pump, which lets the next driver get past. Accept the offer. Four car lengths isn't worth the risk.
Service near New Town
The same rounds take us to Swindon, Even Swindon, Kingshill, Walcot West and Gorse Hill as well as New Town, which is a residential suburb.
If yours is not on the list it doesn't mean we don't come — there are separate pages for the majority of towns across Wiltshire, and the ones mentioned above are simply the immediate neighbours. Phone to enquire instead of guessing, particularly if you are on a border or anywhere the satnav misreads.
This map is the patch the page covers. The vehicle never needs to move to us. We work over every bit of it — kerbside, forecourts, driveways, car parks.
Stuck on the kerbside somewhere around New Town?
Not everyone gets a chance to pull in somewhere sensible. Hazards on in a lay-by somewhere, or pulled onto the verge of Holbrook Way as you realised after setting off — our engineers take that call regularly enough that it's the ordinary kind.
Whether you stay beside your car or stand clear of it hangs on whether sitting in it seems wise. Never start up the motor to nurse the vehicle somewhere better — a diesel running on petrol will usually oblige, and every mile it obliges for is drawing that blend further into the fuel system. We'll send the van to an inconvenient spot without any trouble, and for the car that is a lot better than pressing on.
Petrol in a diesel, but your car has moved
Here is where the local M4 comes in, under 3 miles out of New Town. A misfuelled diesel will usually get you onto it and some distance along before anything seems wrong, and the symptoms when they appear are normally a loss of power, an uneven idle and some smoke rather than a neat stop.
Take the next junction that is sensible, stop there, and don't start the car to move it. Presume the worst of that on a long drive. Anything close to the under 50 miles to the closest city, and the contamination has been through the fuel filter, through the pump, through your injectors. Mention it when you phone. What our engineers bring alters.
All about New Town
New Town is a suburban area in Wiltshire, situated inland at an elevation of 105 metres, with terraced housing being the predominant type of accommodation. New Town lies approximately 26 miles from Oxford and 71 miles from London, making it a commuter hub for those working in nearby cities. New Town is close to other nearby places such as Swindon and Kingshill, and has a population of around 12851 residents. New Town sits within the wider landscape of the South West region, characterised by rolling hills and countryside.
What happens when our engineers reach you around New Town
- The replies change the work, which is why we ask before quoting: what was put in, how much of it, and whether your engine has run.
- Away flows the contaminated mixture.
- Lines purged, filter cleared. Whatever remains later is not the thing that created the trouble.
- Clean diesel goes in, and then the fuel system gets bled.
- When it is fired up, we make sure it runs properly on new diesel.
The vehicle is then ready for you to drive away. All of it is done where the vehicle is, so it never needs to go to a workshop, and when it has been spotted soon, permanent damage is very unusual.
A separate matter: AdBlue in a diesel tank around New Town
If what was put in was AdBlue instead of petrol, the first instruction is unchanged — don't start the vehicle — yet this issue is not. Diluted diesel, and no protection left for your fuel system that relies on it. That is petrol. Corrosion and residue are what a diesel tank gets instead, as AdBlue is urea in water.
Our engineers deal with both, and AdBlue removal around New Town has its own page with the full story — including why it's frequently the more serious of the two.
New Town pricing for a petrol-in-diesel drain
One price would not be fair here, since this isn't one job. These are the things that change it:
- This is the main one: whether your motor has been started, or driven.
- Wrong fuel in, against what that tank takes — that ratio.
- Which was put in: unleaded or AdBlue.
- Whether a van can sensibly reach the car and work on it, which depends on where your car is.
Tell us your car, the quantity and if it has run, and you will get a straight answer instead of a range. If it isn't pressing — your car is at home and going nowhere — works too.
New Town drivers ask us these about petrol in diesel
At a petrol station around New Town, can you do a fuel drain there?
Yes — forecourts are where a good share of this gets done. Our engineers visit Esso and the other forecourts locally all the time, with the site's agreement — tell us which one you're at when you phone and we'll tell you whether we can work there.
A few litres of petrol in a diesel — too much?
Litres are not the yardstick. Proportion is, and a lot more than either, it matters if anything has been run. What determines how much work is needed is if that blend has been pulled through the system — since even though five litres in a nearly empty tank is a distinct case from five in a full one, either way that is the question.
I drove the vehicle after putting petrol in my diesel. What now?
Switch off somewhere sensible, then keep it that way after you stop. Not restarting it is the single most useful thing available to you now. Driving does shift the trouble out of the tank and into the pump and injectors, yes, and it remains salvageable much more frequently than drivers expect.
Fuel drains and manufacturer warranties
No. Carried out properly, draining and rinsing is no alteration at all, and the warranty from your manufacturer is unaffected by it. Another good reason to leave it turned off: running a diesel on petrol is the thing likelier to cause an argument with one.
Two-stroke oil in the tank, and then home?
No. Two-stroke oil is an old workaround for a separate issue and it doesn't restore what petrol has weakened. The tank still has petrol in it afterwards, and your pump still has to put up with it.
Does petrol in a diesel have to go to a main dealer?
There's no need to take it to a franchised dealer, as our engineers drain and flush the car wherever it is.
Is the car still with you?
Your engine remains off.
Driven it already? Then somewhere safe, stop, switch off, and no restarting the vehicle later on. This is recoverable from a lot more commonly than people fear, and a parked, cold motor is the best place to be in.
At the roadside, on the forecourt or at home — call-out fuel draining around New Town and across Wiltshire.