Black Dam: Put Petrol in a Diesel Car?
Petrol in Diesel drains and flushes misfuelled vehicles where they stand, on the forecourt, by the roadside or on a drive, across Black Dam and the rest of Hampshire. The very first thing to do is not to fire up the motor. When the motor has not run and the fuel is still in that tank, a drain is almost always all it requires, and the next few minutes determine that, not how much went in. A single ring to us is sufficient: our team shall show you what follows from here. Try that right away.
Petrol in a diesel: what to do now
- Don't crank it — and do not believe it if it starts. This is the part motorists get wrong about petrol in a diesel in particular. A petrol motor given diesel usually just won't run, so the driver stops and the harm stops with them. A diesel given petrol typically starts, idles and pulls away quite happily for a few miles. It is not fine. It is wearing out the fuel system as you drive.
- Switching your ignition on frequently primes that system, and priming is what pulls petrol out of your tank then into your pump and injectors. Those are the components diesel keeps protected on its way through, before it combusts. Petrol handles the burning and none of the lubricating. Leave the car's ignition alone.
- Do not weaken it. Diesel poured on top clears nothing, so all you get is more of what was already there, because percentage is not how a diesel fuel system tolerates petrol. Super unleaded? Still petrol. The type makes no difference.
- Remain where you are if you reasonably can. A car that has never shifted is the easiest one to sort, and we would rather get to a difficult place than have it started. If you are parked on the verge on Black Dam Way, put the hazards on then keep the car there.
- Have your location prepared before you phone. A postcode beginning RG21 3 and whatever is nearest to you with a label on it is the difference between a van arriving and a van circling.
- What went in, about how much, and also whether your car has started — these three answers settle your whole call-out. Call 0333 366 0103 then tell us.
Tonight, please, rather than Monday. Driving it home is the only thing not to do: a commute has pushed real volume through the pump already, petrol-thinned diesel and plenty of it, and the return journey would roughly double the figure to no gain. The Volkswagen Golf can sit at Basingstoke perfectly well. Phone from the platform if easier; standing over us while our engineers work is not needed.
Each start primes your fuel system and draws more of that mixture out of the tank and toward the pump — which is why a vehicle shuffled twice into a nicer spot has gradually become a bigger job than one left just where it stopped. So where our technicians can't work beside the diesel Renault Megane, we roll the car without starting it. None of that is pedantry about a couple of seconds of running. Car parks like the one at New Cash And Carry our engineers work in all the time, and the fuel is rarely the complicated part: the bay is. Motors either side, a trolley shelter behind, sometimes a height limit at the way in settling if our van reaches you at all. Tell us how boxed in you are, and which way the vehicle points.
Nothing alerts you, because from behind the wheel there is nothing to be warned about. The diesel Peugeot 308 will have seemed completely ordinary on the way back from Rucstall Primary School, and they all do — which is the snag with petrol in a diesel instead of the reverse. Diesel in a petrol car usually refuses to run, stopping the driver and stopping the damage with them. Petrol in a diesel starts, idles, moves off as though nothing had happened, and all the while the pump does its work without the protection its fuel is supposed to supply. Tell us roughly how far, and how hard. The harder counts more.
This is what a job in the car park at The Rucstall generally looks like. Our engineers get to your car, ask what got in, approximately how much, and whether the motor has run since — these three answers determine most of the work. Then the tainted mix comes out of the tank, the fuel lines get rinsed, and the filter comes off where your Nissan Qashqai has a serviceable one. Clean diesel goes in and your system is primed. Then we fire it up, make sure it runs smoothly, and you pull away.
No dashboard light exists for this, which is why cars in that position usually get driven a second time before somebody rings. Do not be one of them. The throttle went soft and your idle turned uneven after a few streets, and your diesel Kia Sportage is now sitting close to War Memorial. Sluggishness there means fuel that cannot build pressure fully rather than an engine giving up. Turn off. Phone us.
On the forecourt: draining petrol from a diesel
A fair share of the job gets done at a pump, because that is where it often starts. If you're still at the forecourt at Texaco, that is normally where this drain happens — our technicians work on station forecourts all the time, with the station's agreement.
No place but a forecourt can the mistake be halted with the motor still unrun. The few seconds between checking your receipt and reaching for the key decide how much requires cleaning. Everywhere other than the forecourt — a car park, a driveway, a lay-by — the car was fired up and moved to get there, so fuel was pulled from the tank, through the fuel filter and into the high-pressure pump. That means the lines and your filter require cleaning as well as your tank. It's not a calamity, and we can still sort it out where the car sits.
Roll the car out of the way if the attendants volunteer, and they usually will. The next motorist gets by the pump, and that's worth doing. Four vehicle lengths is not worth a start.
Places we reach near Black Dam
Black Dam is a residential suburb, and our team go out to the town and to the places near it on the same trips: Eastrop, South View, Basingstoke, Kings Furlong and Viables.
There are separate pages for nearly all places across Hampshire, and the ones named above are just the immediate neighbours — so yours being left off this list means nothing whatsoever about whether our engineers come. Ring us and ask instead of assuming — borders especially, and anywhere your phone can get wrong.
This map is the area this page includes. We work roadside, at forecourts, on driveways and at car parks throughout all of that, and the vehicle does not need to move to us.
Stuck at the kerbside somewhere in Black Dam?
The opportunity to pull over somewhere suitable does not come to everybody. A routine call for us and not an unusual one: worked out after setting off, finished up along the verge of Gainsborough Road or at a lay-by with the hazards flashing.
Safe there? Sit with it. Not okay? Get out and clear of it. It will often oblige. A diesel running on petrol limps along perfectly willingly, and that's the trouble: fire it up to get to somewhere handier and the blend goes further into the system with every mile travelled. A technician driving to an inconvenient location is no bother for us, and it is a lot better for the vehicle than carrying on.
So you've run it? Petrol in a diesel after some miles
The M3 is the one that counts here, and it sits under a mile from Black Dam. A drop in power, a rough idle, smoke: those are the signs when they come, rather than a clean stop — and a misfilled diesel will frequently take you onto it and some distance along before anything feels wrong at all.
The first sensible exit is the one to take. Switch off there, and leave the restarting alone. Long run? Anything approaching the under 25 miles to the nearest city and you should suppose the lot — filter, pump, injectors, all of it reached by the mixture. Say that on the call, since it alters what goes in the van.
Black Dam itself
Black Dam is a suburban area in Hampshire, situated inland at an elevation of 91 metres, with terraced housing being the predominant type of accommodation. Black Dam is located near the towns of Basingstoke and Winchester, and is also close to the smaller areas of Eastrop and South View. Black Dam sits within the wider commuter belt of London, approximately 44 miles to the south east. Black Dam remains a residential community with a population of around 2860 people.
What happens when we get to you around Black Dam
- Our technicians ask first, quote after. What went in? How much? Has the motor run? Those answers shape what the work really is.
- Out goes the tainted mixture.
- Fuel lines are cleaned through and the fuel filter cleared, leaving nothing in your system that caused any of this.
- Fresh diesel goes in, and then the fuel system gets bled.
- After it is fired up, we check it runs smoothly on fresh diesel.
From there, you're ready to pull away. There is no need for a garage at any stage, since the work is all done where your car is, and when it is caught quickly, long-term damage is very unusual.
Black Dam AdBlue removal is a distinct matter
AdBlue instead of petrol? Then the opening instruction is unchanged — your engine remains off — whereas this issue underneath it is a different one altogether. Diluted diesel, and no protection left for the system that depends on it. That's petrol. Corrosion and build-up are what a diesel tank gets instead, since AdBlue is urea in water.
AdBlue removal around Black Dam has a page of its own with the details on it, including why it is often the more serious of the two. Our technicians handle both.
What a petrol-in-diesel drain costs in Black Dam
Frankly, no single price fits on a page like this. The job varies. Here is what varies it:
- This is the main one: whether the engine has been run, or driven.
- How much of the wrong fuel was put in, set against how much that tank holds.
- AdBlue or unleaded, whichever went in.
- Where is it? And can our van get to it and work there safely?
Tell us your vehicle, the amount and whether it has run, and you will get a firm answer rather than a range. If it isn't urgent — the vehicle is at home and going nowhere — works too.
Petrol in diesel: common queries in Black Dam
Fuel drains on a Black Dam petrol station forecourt
Yes, and it is where a fair share of this work takes place. Tell us which one you're at when you call and we'll tell you whether our technicians can work there. With the site's permission our engineers work at BP and the other forecourts locally all the time.
How much petrol in a diesel is too much?
Proportion settles it instead of litres — and more than either, whether the engine has run. Five litres in a nearly empty tank is a different situation from five in a full one — but either way, the thing that determines how much work is required is whether that mix has been sucked through your fuel system.
Already driven it with petrol in your diesel? Now what?
Pull in somewhere sensible, turn off, and keep the car off. Driving is what shifts the issue from your tank into the pump and injectors — but it's fixable a lot more commonly than drivers assume, and the single most helpful thing you can do now is not restart it.
Will a fuel drain void my warranty?
A drain and flush carried out correctly isn't an alteration and doesn't cancel a manufacturer's warranty. A dispute over a warranty is likelier to come from running a diesel on petrol — so leave it turned off.
Can I just add two-stroke oil and drive home?
No. It belongs to a different fault from a different era, and petrol has diluted something no oil of that kind restores. Afterwards? Still petrol in that tank, and a pump that has to put up with the stuff.
A main dealer for petrol in a diesel — necessary?
Wherever your car is, our technicians drain and flush it there, so a drive to the main dealer doesn't come into it.
Standing next to it?
Turned off is how it remains.
Turn it off somewhere sensible then leave it off, if you have already driven it. Cold, still, going nowhere: that is the best position to be in. Motorists fear this far more than they need to.
Mobile fuel draining in Black Dam and across Hampshire — at the kerbside, on the forecourt or at home.