Old Bricket Wood: Put Petrol in a Diesel Car?
Never turn on the motor. While the fuel is still sitting in your tank and the engine has not been started, a tank drain is nearly always all it needs — and that is decided in the coming few minutes, not by how much was put in. Petrol in Diesel drains and flushes wrongly fuelled cars where they are, throughout Old Bricket Wood and the remainder of Hertfordshire, on the forecourt, at the roadside or on a private drive. Phone so we shall show you what happens after that before you do much else.
Petrol in a diesel: what to try first
- Feed a petrol engine diesel and it will usually refuse to run at all, and so the person stops there and so does the damage. Feed a diesel petrol and the thing starts, it ticks over, it drives off — fine for a few miles. People have that reversed, which is the thing they get wrong about petrol in a diesel specifically. So do not fire it up. And if started, do not believe it: that fuel system is wearing down while you drive.
- Switching your ignition on frequently primes the system, and priming is what pulls petrol out of that tank then into your pump and injectors. Those are the components diesel keeps greased on its way through, before it ignites. Petrol handles the burning and none of the protecting. Leave your ignition alone.
- Don't thin it. Diesel put on top clears nothing, so all you get is more of what was already there, since percentage isn't how a diesel fuel system accepts petrol. Super unleaded? Just petrol. The grade makes no difference.
- Remain where you are if you sensibly can. A car that has never shifted is the simplest one to deal with, and our team would sooner drive to an awkward place than have it started. If you are stopped on the verge on M1, turn the hazards on then keep it there.
- A van arriving rather than circling turns on two things: a postcode beginning AL2 3, and whatever is nearest to you with a name on it. Have both prepared before you dial.
- What was put in, about how much, plus whether the car has started — the three details shape your whole call-out. Ring 0333 366 0103 then tell us.
Pump-side drains for petrol in a diesel
A fair chunk of this job ends up completed at a pump, as that's where it mostly begins. If you are still at the forecourt at Sainsbury's, that's normally where the drain takes place — we operate on garage forecourts all the time, with the owner's consent.
No place other than a garage can this be spotted with your engine still cold. Anywhere else — a car park, a driveway, a lay-by — your car was switched on and driven to get there, which means fuel was pulled from your tank, through the fuel filter and into the high-pressure fuel pump. That's not a catastrophe, and we can still deal with it where it sits. It does mean the lines and the fuel filter need cleaning as well as your tank, and that's decided by the few seconds between seeing the till receipt and going for the keys.
Attendants will usually help out pushing it clear of the pump, which lets the next driver get through. Take the help. Firing the car to shift four vehicle lengths is not.
The enquiry our engineers want goes like this: diesel Renault Clio, a few litres of unleaded, driven a couple of miles, now shut off outside Co-op Food. What we are really asking is how much fuel your pump has pulled — not how long ago it was.
Every restart primes the fuel lines and pulls more petrol through the fuel filter and into your pump. So a misfilled diesel Skoda Octavia on the zig-zags by Coates Way JMI and Nursery School is a nuisance, while the same car fired up three more times to be courteous is a fuel system rather than a tank. A passer-by will advise you to shift the car out of the gateway and sort it out later. Don't. Leave it there, let everyone grumble, and give us a call.
Diesel has to be heavy enough to seal the close-fitting parts it passes through, and petrol weakens it. That's the full process, and it explains the usual Peartree Wood call: a diesel Nissan Qashqai that drove out there without a murmur and came back down on power, uneven at idle, perhaps smoking a little. A diesel injection system works hydraulically as well as chemically — it needs the fuel to hold pressure, not merely to burn — so when the fuel weakens, pressure that should build and stay built starts leaking past gaps instead, and your engine gets a weaker, later, less even delivery than it was built about. None of that is the engine failing, which is the bit worth hearing: it's the fuel no longer acting like diesel, and it stops when the fuel is sorted.
Phoning from close to Munden House? Three things help us. The filler — which side of the vehicle it is on. Room for a technician beside you, without the road being blocked. And whether anything has run since the fill-up. The spot itself barely counts: on-street is where our technicians work most, and we would much rather have a tight space than a vehicle somebody has driven somewhere quicker. Then it is a drain for the Mercedes C-Class, a filter change where there's one worth changing, lines cleaned, clean fuel put round the entire system. By now the worst of it is in the lines and not your tank.
A few streets, then it stopped. Throttle soft, idle lumpy, and your diesel Vauxhall Astra is parked up by Our Lady and St. Michael's Catholic Church. The motor isn't failing — that sluggishness is fuel that won't build pressure. There is no light on the dash for it, and so cars like yours typically get driven a second time before anybody picks up the phone. Don't. Off, and phone us.
Old Bricket Wood and the places next to it
Being a residential suburb, Old Bricket Wood gets a frequent call, while the villages round about go along on that same journey: Munden and Meriden, Garston and Bricket Wood, Smug Oak.
Our engineers still come. The places above are only the immediate neighbours, and a page is there for nearly all locations around Hertfordshire, so an absence from the list is not an absence from the coverage. Close to the border, or anywhere a satnav can't find? Contact us to check instead of guessing.
Use this map for the area included on this page. The car never needs to come to us. We operate across all of it — roadside, forecourts, driveways, car parks.
Roadside breakdowns around Old Bricket Wood
Some drivers get no safe spot to pull over whatsoever. Set off, then noticed? Ended up by the verge on Osprey Close, or sat in some lay-by with your hazards going? That is a normal call here. Not an unusual one.
Whether you sit with the motor or keep away from it depends on if being nearby is safe. Never fire up the motor to nurse the vehicle somewhere better — a diesel running on petrol will often oblige, and every mile it obliges for is dragging the mix further into the system. We will take our van to a difficult location without any fuss, and for the car that is a lot better than driving on.
A few miles on petrol in a diesel: what next?
Here is where the local M1 comes in — under a mile away from Old Bricket Wood. Some way along, and onto it in the first place: a misfuelled diesel will usually manage both before anything seems wrong. What you get then is rarely a tidy stop. Power drains away, the idle turns uneven, and there may be some smoke.
Get off at the first sensible exit, switch off, and never start it to move it. Long run? Anything near the under 5 miles to the nearest city and you should suppose the lot — filter, pump, injectors, all of it got to by the contamination. Say that on the phone, as it changes what goes in our van.
All about Old Bricket Wood
Old Bricket Wood is a suburban area in Hertfordshire, situated on the riverside at an elevation of 81 metres, with semi-detached housing being the predominant type. Old Bricket Wood lies close to the city of St Albans, approximately 4.4 miles away, and is also near other places such as Munden and Garston. Old Bricket Wood is part of the wider commuter belt, being around 16.4 miles from London. Old Bricket Wood has a population of around 691 residents.
What our technicians do when we reach you around Old Bricket Wood
- Our technicians ask first, price after. What got in? How much? Has the engine run? Those responses alter what the work really is.
- Our technicians clear that tank of the contaminated mixture.
- Our engineers clean your fuel lines and clear the filter, so what's remaining in the fuel system is not what started the problem.
- We pour clean diesel in and prime the fuel system.
- After it is fired up, our technicians check it runs properly on clean diesel.
That leaves the car ready to set off. All of this is done where the car is, so it never needs to be taken to a garage, and when it has been caught early, lasting damage is very rare.
A separate job: AdBlue in a diesel tank in Old Bricket Wood
AdBlue instead of petrol? Then the opening step is unchanged — the engine stays off — whereas this issue under it's a different one altogether. Weakened diesel, and no protection left for the fuel system that relies on it. That is petrol. AdBlue is urea dissolved in water, and in a diesel tank it leads to rust and residue in its place.
Both are ours. There is a separate Old Bricket Wood page for AdBlue removal, with the details on it — including the reasons it frequently turns out to be the worse of the two.
What a petrol-in-diesel drain will cost around Old Bricket Wood
What changes the price is listed below, because this job is not one job and we cannot frankly put a single figure on this page.
- Whether the motor has been run or driven. This is the main one.
- The tank's capacity, set against how much of the wrong fuel got into it.
- Whether it is unleaded or AdBlue.
- Access: the vehicle's position, and whether working on it there's sensible for a technician.
Tell us what the car is, how much went in, and if the engine has run. A firm answer comes back, not a range. Vehicle at home, going nowhere, nothing pressing about it — is fine for that.
Petrol in diesel: common questions around Old Bricket Wood
At a petrol station around Old Bricket Wood, can you do a fuel drain there?
Much of what our engineers do gets done nowhere else. So yes. Tell us which one you are at when you call and we'll tell you whether our engineers can work there. With the station's consent our technicians visit Asda and the other forecourts nearby regularly.
How much petrol in a diesel is too much?
Whether your engine has run matters much more, though the ratio matters too, rather than the litres. What decides how much work is required is whether that mixture has been drawn through the system — since although five litres in a nearly empty tank is a separate case from five in a full one, either way that is the query.
I put petrol in my diesel and drove the car. What now?
Stop sensibly. Off. Nothing after that. It is salvageable far more often than motorists expect, even though driving is what shifts the problem from the tank into your pump and injectors — and the single most useful thing you can do now isn't restart it.
Fuel drains and manufacturer warranties
A manufacturer's warranty outlasts a drain and flush done to a proper standard, which is no modification at all. Another reason to leave it turned off: running a diesel on petrol is the thing likelier to cause a disagreement with one.
Can I just add two-stroke oil and drive home?
No. Two-stroke oil is an old fix for a separate issue and it does not put back what petrol has weakened. Later? Still petrol in the tank, and a pump that has to put up with the stuff.
Does petrol in a diesel have to go to a main dealer?
You do not need one. Your car is drained and cleaned wherever it is, with no need to take it to a main dealer.
Standing next to it?
Turned off is the way the car stays.
Turn it off somewhere safe and leave it off, if you have already driven it. Cold and still, a motor is in the best position available — and drivers fear this much more than the recovery rate warrants.
At the kerbside, on the forecourt or at home — call-out fuel draining around Old Bricket Wood and across Hertfordshire.