Oldmixon: Put Petrol in a Diesel Car?
Petrol in Diesel drains and flushes wrong-fuelled vehicles where they sit, on the forecourt, at the roadside or on a drive, throughout Oldmixon and the rest of Somerset. The very first thing to do is not to fire up the engine. While the motor has not run and the petrol is still sitting in the tank, a fuel drain is nearly always all it takes, and the coming few minutes settle that, not how much went in. Call us and we will show you what comes from here before you do any more.
What to try now about petrol in a diesel
- Do not fire it up. Started anyway? Then never believe it. Diesel in a petrol motor normally won't run, and so the motorist stops and the wear halts with them. Petrol in a diesel? It starts. It ticks over. It pulls away happily, for several miles. Drivers get that backwards. It isn't all right — your fuel system is grinding every mile you cover.
- Two jobs, diesel: it combusts, and on the way through it keeps that high-pressure pump and injectors greased. Petrol only manages the one. Which is why the ignition remains off too — turn it on and you often prime your system, and that's petrol exiting your tank for precisely those parts.
- Don't put diesel on top to weaken it. A diesel fuel system does not handle petrol by percentage the way that guidance suggests, and topping up clears nothing — it merely gives you a bigger tank of the same mix. The octane makes no difference either: super unleaded is still petrol.
- A vehicle that has not moved is the easiest one to sort, and so stay where you are if you safely can. Stopped on the verge on Totterdown Lane? Hazards on, and leave the car there. A difficult spot suits us better than a started diesel.
- Know where you are before phoning. A postcode starting BS24 9, and the name of whatever is next to you. Otherwise the technician circles rather than arriving.
- Dial 0333 366 0103. Prepare for three points — what was put in, roughly how much, plus whether the car has been started. The answers settle everything that comes after.
Phone before you move the car. Petrol into a diesel Renault Megane this morning, and it outside Weston-Super-Mare ever since? Then the afternoon has taken nothing from you: fuel sitting in a tank is inert, and any damage was done on the journey in, when your pump was drawing diesel that petrol had diluted.
Any start primes your fuel system and pulls more of the blend out of the tank and on to your pump — which is why a motor moved twice into a better bay has silently turned into a bigger job than one left exactly where it stopped. So where our engineers can't work next to your diesel Mercedes C-Class, our engineers shift it without firing it. None of that is pedantry about a handful of seconds of running. Car parks like the one outside Lidl our engineers work in all the time, and the fuel is rarely the difficult part: that bay is. Vehicles either side, a trolley shelter behind, occasionally a height bar at the entrance settling whether a van reaches you at all. Tell us how penned in you are, and which way your car faces.
Fine on the way out, flat on the way back. If that is how the run to Bleadon Hill Golf Course went, the tank is where to look. Petrol weakens diesel, and thinner fuel slips past the tightly fitted parts that are supposed to build injection pressure — so the further your Vauxhall Astra went, the less well it held that pressure. Stop somewhere safe, turn off then phone us.
Most of these happen somewhere new, and the cause is mechanical instead of slapdash — practically no resistance meets a smaller petrol nozzle entering a newer diesel filler neck. Two days into a diesel Volvo XC60, a fill-up near Weston-Super-Mare Football Club that you didn't think about? Ring us from where you are. Courtesy and hire cars go further before anybody notices it, and the further they go, the more petrol winds up at the fuel injectors.
What happens next is the issue. Your engine at once draws the petrol still waiting in the fuel filter and the feed lines back round through your pump a second time, as emptying a tank does nothing about fuel that has already left it. Drain it then put clean diesel in, somebody sure of themselves will tell you — and that advice is only half right, because do it to a diesel Audi Q3 parked up, ROC Post Bleadon say, and the thing starts, which is what makes it sound reasonable. Call us instead. We flush the circuit and take your filter off where the vehicle has a serviceable one, and that is the difference between your car being fixed and the car merely starting.
Can petrol be drained out of a diesel at a forecourt?
It kicks off at the pump, generally. Often enough the job ends at one as well. If you're still on the forecourt at the nearest petrol station, that's typically where this drain happens — we operate on petrol station forecourts regularly, with the owner's permission.
Before your engine has started — the forecourt is the single place the mistake ends up stopped. Our engineers can still deal with it where it sits, even away from the forecourt. In a car park, on a drive or in a lay-by, the vehicle has been fired up and moved there, and that pulled fuel through the fuel filter then into the high-pressure pump, all the way from your tank. None of that is a calamity, but the flush then has to go past your tank to the fuel lines and the filter, and the few seconds between seeing your receipt and going for your key are what settle that.
Away from the petrol pump, the next motorist can get past — so yes, let the staff help you move the car. Worth doing. Four car lengths isn't worth the risk.
Service near Oldmixon
Oldmixon is a residential suburb, and so our technicians go out to it and to anywhere near it on the usual rounds: Purn, Uphill Manor, Bleadon, Uphill and Hutton.
We still come. The places above are merely the closest neighbours, and a page is there for most places around Somerset, and so an absence from the list isn't an absence from our coverage. Contact us and check instead of presuming, particularly when you're on the boundary or anywhere your satnav gets wrong.
The area this page covers is on the map. Our technicians work roadside, on forecourts, on driveways and in car parks over all of it, and the car does not need to travel to us.
Broken down at the kerbside in Oldmixon
Not everyone finds a safe place to pull over. A normal call for us instead of an unusual one: worked out after setting off, ended up along the verge of Haywood Close or at a lay-by with your hazards going.
Stay by the car when it's wise to sit inside, but out of the vehicle if it's not. Never fire it up to get to a better place. It will go — a diesel on petrol generally obliges — and each mile of obliging pulls the blend deeper into the fuel system. Driving on does your car far more harm than a van heading out to a tricky location, and that's no trouble for us.
A couple of miles on petrol in a diesel: what now?
Here is where your M5 comes into it — under 3 miles from Oldmixon. A misfilled diesel will usually get you onto it and some way along before anything feels wrong, and the signs when they come are generally lost power, a rough idle and smoke rather than a tidy stop.
Never start it to reposition. Come off at the next safe junction then switch off. On a longer run — anything near the under 15 miles to the closest city — assume the contamination has been through the fuel filter, the pump and your injectors, and mention it when you phone. It alters what our engineers bring.
About Oldmixon
Oldmixon is a suburban area in Somerset, situated near the coast and approximately 14 miles from Cardiff. Oldmixon has a relatively low elevation of 14 metres and is surrounded by nearby places such as Purn and Uphill Manor. Oldmixon is characterised by its predominantly detached housing stock, which reflects its residential nature. Oldmixon is also close to Bleadon, another local community in the area.
The visit around Oldmixon, step by step
- The answers change the work, which is why we ask before pricing: what went in, how much of it, and if the engine has run.
- Your tank gets cleared of it.
- Lines purged, filter cleared. Whatever remains afterwards isn't the thing that created the problem.
- Bleeding your system follows, once clean diesel is in.
- The engine is started and checked to confirm it runs correctly on fresh diesel.
From there, you're ready to set off. There is no need for a garage at any point, since the work is all done where your car is, and when it is noticed early, long-term damage is very uncommon.
AdBlue in a diesel tank around Oldmixon is a separate job
If what went in was AdBlue instead of petrol, the first step is the same — never fire it up — yet this fault is not. The protection a fuel system relies on gets stripped away by petrol, which dilutes the diesel. AdBlue is urea in water, and in a diesel tank it leads to rust and build-up instead.
AdBlue removal around Oldmixon has a page of its own with the detail on it, including why it's frequently the more serious of the two. Our engineers handle both.
What a petrol-in-diesel drain will cost in Oldmixon
Our engineers can't put one number on this page truthfully, because this job is not one job. What moves it:
- Started? Driven? Either answer counts more than anything else on this list.
- Wrong fuel in, against what the tank holds — that proportion.
- Which got in: unleaded or AdBlue.
- Where the car is, and if a van can safely reach and work on it.
Tell us the vehicle, the amount and if it has run, and you will get a clear answer rather than a range. Not urgent, with your car at home and going nowhere? Then works.
Petrol in diesel: common questions in Oldmixon
I'm on a forecourt in Oldmixon. Can you drain the car here?
A good part of this work happens there, so yes. Our technicians attend Shell and the other forecourts around town regularly, with the site's agreement — tell us which one you're at when you call and we'll tell you whether we can work there.
How much petrol is too much for a diesel?
It rests on the ratio instead of the litres, and a lot more on whether the motor has run. Five litres in a nearly empty tank is a different matter from five in a full one — but either way, the thing that settles how much work is required is if that mixture has been sucked through your fuel system.
Petrol in my diesel, and I have driven the vehicle
Somewhere sensible, then stop, then turn off and keep it off. Driving moves the issue along — out of your tank, into the pump and injectors. People fear it a good deal more than the recovery rate warrants, mind. The one truly helpful thing left to you is not restarting it.
Will a fuel drain void my warranty?
It isn't a change, so a drain then flush carried out properly does not invalidate a manufacturer's warranty. Running a diesel on petrol is the thing likelier to cause a dispute with one, which is another good reason to leave the vehicle switched off.
Two-stroke oil in your tank, and then home?
What petrol has weakened isn't replaced by two-stroke oil, which is an old remedy for a separate fault. So no. Later? Still petrol in your tank, and a pump that has to put up with the stuff.
A main dealer for petrol in a diesel — essential?
You don't need one. Your car is drained and flushed wherever it is, with no need to bring it to a dealership.
You, and the car, still together?
Never switch your engine on again.
Switch it off somewhere sensible then keep it off, if you have already driven it. Cold, parked, going nowhere: that is the best place to be in. Motorists fear this far more than they need to.
Across Somerset and in Oldmixon: on-site fuel draining, at home or on the forecourt or at the kerbside.