Put Petrol in a Diesel Car in Up Somborne? Don't Start It
With that tank still holding the petrol and the engine not yet turned over, almost every job takes only a drain, so leave your engine off. That outcome is decided in the minutes straight after filling up, rather than by the amount that went in. All over Up Somborne and the remainder of Hampshire, Petrol in Diesel drains the car and cleans it where it sits, whether by a roadside, on a drive or at a forecourt. Phone before everything else begins, so you'll see what follows after that.
Your next five minutes: petrol in a diesel
- Feed a petrol motor diesel and it will typically not run at all, so the driver stops there and so does the harm. Feed a diesel petrol and the car starts, it idles, it drives off — fine for a couple of miles. Motorists have that muddled, which is the thing they get wrong about petrol in a diesel specifically. So don't crank it. And once started, don't depend on it: the fuel system is wearing whenever you drive.
- Diesel burns, and before it burns it greases — the high-pressure pump, those injectors. Petrol handles only the burning. So leave the car's ignition be too: turning it on is often enough to prime that system, and priming moves petrol from the tank into just those parts.
- That advice supposes a diesel fuel system accepts petrol by percentage. It will not. Pour diesel on top and nothing at all is cleared; what you have is a fuller tank of the same blend. And no, the type makes no difference — super unleaded is simply petrol.
- A car that has not moved is the simplest one to deal with, so remain where you are if you safely can. Stopped on the verge on Strawberry Lane? Hazards on, then leave it there. A difficult location works for us better than a started motor.
- Before you phone, get your whereabouts. Anything next to you with a sign on it, plus a postcode starting SO20 6 — that is what decides whether our van shows up or circles.
- Ring 0333 366 0103. Expect three questions — what got in, approximately how much, and if the engine has been run. Those replies decide all that happens next.
Forecourt drains for petrol in a diesel
It begins at a forecourt, usually. Quite often it wraps up on site too. The drain typically gets done on the spot. Still on the forecourt at Esso? Given the owner's permission, that's a spot our technicians work, and often.
At a forecourt, it gets halted with the motor never fired, and nowhere else does that. We can still sort it out where it sits, even away from the pumps. In a car park, on a drive or in a lay-by, the car has been fired up and moved there, and that sucked fuel through your filter and into the high-pressure fuel pump, right from that tank. None of that is a disaster, although the flush then has to reach past the tank to the fuel lines and your filter, and the few seconds between seeing the receipt and reaching for the keys are what decide that.
The staff will generally offer to push the vehicle away from the pump so the next customer can get by. That's worth doing. Starting the car to roll four car lengths isn't.
The awkward part is that bay, not the fuel. Motors either side of you, a trolley shelter behind, and occasionally a height limit on the way in that decides if a technician can get to you at all — so when you ring from a car park like the one at Aldi, tell us how much space there's about you and which way round the vehicle is. Those our technicians attend frequently. Should there be no space to work next to the diesel Renault Megane, it gets rolled with the motor off, and not out of pedantry over a few seconds of running: priming happens at every start, more of that blend departs your tank for your pump, and two shunts into a better spot have silently made a bigger job of what was merely a car sitting still.
What we will ask about is if the run there was brief and cold, because that is where petrol is least able to burn properly — and whatever won't burn can slip past the piston rings and into the sump. Right up to the moment someone takes it home, a diesel Audi A4 standing in the parking area by the pub in the village carrying a tank full of petrol in it is a straightforward job. Nothing deteriorates while it waits, so park it overnight then phone us next morning.
Diesel has to be thick enough to seal the close-fitting parts it flows through, and petrol thins it. That is the entire mechanism, and it accounts for the normal Fox Heath Copse call: a diesel Ford Focus that travelled out there without a murmur and came back down on power, lumpy at idle, perhaps smoking a little. A diesel injection system works hydraulically as well as chemically — it requires the fuel to hold pressure, not merely to burn — so when your fuel dilutes, pressure that should build then stay built starts escaping past clearances instead, and the motor gets a poorer, later, less even delivery than it was engineered about. No part of that is the engine failing, which is the part worth hearing: it's your fuel no longer acting like diesel, and it stops when your fuel is sorted.
We rinse your lines rather than only emptying your tank, and the reason is that weakened fuel has already reached your filter and your pump: it was a start and a drive, however short. The drive truly helps — pulled off the forecourt, receipt read, a diesel Mercedes E-Class parked up near Rookley Manor a couple of hundred yards later is about as well as this goes once the motor has turned. Call us then leave it off.
No warning exists for this, which is why cars in that position typically get driven a second time before somebody calls. Don't be one of them. The throttle went soft and your idle turned uneven after a few streets, and the diesel Skoda Superb is now resting close to St Mary's Church. Deadness there means fuel that can't build pressure correctly instead of an engine packing up. Turn off. Ring us.
Parts we reach around Up Somborne
As a village, Up Somborne gets a regular visit, while the areas round about come with it on that same trip: Little Somborne and Ashley, Westley and Crawley, Kings Somborne.
Our engineers do come. Those names above are only the closest neighbours, and a page is there for nearly all locations around Hampshire, and so an absence from the list is not an absence from our coverage. On the border, or anywhere your satnav gets wrong? Call us and check rather than assuming.
That map is the patch this page covers. Roadside, forecourt, drive, car park: the lot is ground we work on, and none of that asks your car to travel to us.
Roadside call-outs around Up Somborne
Not everyone gets a safe place to stop. If you realised after setting off and finished up on the verge on Winchester Road, or in a lay-by somewhere with your hazards flashing, that is a normal call for us instead of an unusual one.
Fine where you are? Remain with it. Not fine? Step out and clear of it. It will usually oblige. A diesel running on petrol limps along quite willingly, and that is the catch: fire it up to get to somewhere handier and that blend goes further into the system with every mile travelled. Our van heading to an inconvenient spot is no bother for us, and it's a lot better for the vehicle than driving on.
So you've driven it? Petrol in a diesel over a few miles
Here is where the M3 comes into it — under 10 miles away from Up Somborne. It will often get you onto it, and some way along, before you feel a thing. Then it is smoke, an uneven idle and power falling away — not a tidy stop. Misfilled diesels rarely give you one of those.
Take the next exit that's sensible, stop there, and never start it to move it. Presume the worst of it on a long trip. Anything near the under 10 miles to the nearest city, and the mixture has been through your filter, through the pump, through your injectors. Tell us when you phone. What our engineers bring alters.
All about Up Somborne
Up Somborne is a small village in Hampshire, situated on the banks of the River Test at an elevation of 53 metres. Up Somborne has a population of around 526 people and is characterized by its predominantly detached housing stock. Up Somborne is located near the city of Winchester, which is approximately 5.8 miles away, and is also close to other nearby places such as Little Somborne and Ashley. Up Somborne is about 63.4 miles from London, making it a rural retreat within commuting distance of the capital.
What we do when our technicians arrive with you in Up Somborne
- Our technicians ask first, quote after. What went in? How much? Has the engine run? Those answers shape what the work actually is.
- We empty that tank of all the polluted mixture.
- Lines cleaned, filter cleared. Whatever remains later is not the thing that created the trouble.
- Our technicians put fresh diesel in and prime the fuel system.
- When it is fired up, our technicians check it runs correctly on clean diesel.
From that point, you are ready to pull away. We do all of this wherever the vehicle has ended up, which means it never needs to be taken to a workshop, and when it has been caught quickly, it's very uncommon for there to be lasting damage.
AdBlue in the diesel tank instead, in Up Somborne?
Never start it: that first rule stands whether what got in was AdBlue or petrol. What changes is the problem itself. The lubrication a fuel system relies on gets stripped away by petrol, which dilutes the diesel. AdBlue? Urea dissolved in water. Put that in with your diesel and you get rust instead, plus deposits.
We cover both, and AdBlue removal around Up Somborne has its own page with the details — including why it is usually the more significant of the two.
What a petrol-in-diesel fuel drain costs around Up Somborne
We can't put one figure on this page truthfully, since this job is not one job. What changes it:
- Started? Driven? Either answer matters more than anything else on this list.
- How much of the wrong fuel was put in, judged against how much the tank takes.
- AdBlue or unleaded, whichever was put in.
- Access: the vehicle's position, and if working on it there is safe for a technician.
The vehicle, the amount, whether it has run — give us those and the answer comes back straight and not as a range. For the car at home that's going nowhere and is not pressing, is fine too.
Petrol in diesel queries from Up Somborne motorists
Can you do a fuel drain at a petrol station around Up Somborne?
Yes, and it is where a big share of this work happens. Our technicians work at Murco and the other forecourts locally regularly, with the owner's permission — tell us which one you are at when you call and we will tell you whether our technicians can work there.
A couple of litres of petrol in a diesel — too much?
Whether the motor has run counts a lot more, though the ratio counts too, rather than the litres. Five litres into an almost dry tank isn't five into a full one, no. But both land on the same question in the end: has that mix been sucked right through, or has it not?
Already driven it with petrol in the diesel? What now?
Somewhere safe, then stop, then turn off and leave it off. Driving moves the issue along — out of your tank, into your pump and injectors. Motorists fear it a good deal more than the recovery rate warrants, mind. The one truly helpful thing left to you is not restarting the car.
My warranty — does a fuel drain void it?
It isn't a change, and so a drain then flush carried out correctly does not void a manufacturer's warranty. Another reason to leave it turned off: running a diesel on petrol is the thing likelier to cause an argument with one.
Could I put some two-stroke in and just drive?
What petrol has weakened is not replaced by two-stroke oil, which is an old remedy for a distinct issue. So no. Petrol remains in that tank after that, whatever else goes in, and your pump gets no respite from it.
Does petrol in a diesel have to go to a main dealer?
There is no need to bring it to a franchised dealer, because our engineers drain and flush the car wherever it is.
Is the car still with you?
Keep the car shut off.
Switch it off somewhere sensible then leave it off, if you have already driven it. This is recoverable from far more often than people fear, and a still, cold vehicle is the best position to be in.
Call-out fuel draining in Up Somborne and throughout Hampshire — at the kerbside, on the forecourt or at home.