Put Petrol in a Diesel Car in Northwood? Don't Start It
Never start the engine. If the fuel is still inside your tank and your engine has not turned over, a fuel drain is almost always all it takes — and that's settled in the next few minutes, not by how much was put in. Petrol in Diesel drains and flushes wrong-fuelled cars where they are, across Northwood and the remainder of Merseyside, on the forecourt, by the roadside or on a driveway. A single ring to us will be sufficient: our team shall explain what follows next. Try it straight away.
What to do first about petrol in a diesel
- Feed a petrol engine diesel and it will typically not run at all, so the motorist stops there and so does the harm. Feed a diesel petrol and the engine starts, it idles, it moves off — fine for several miles. Most people have that reversed, which is the bit they get wrong about petrol in a diesel in particular. So never start the vehicle. And having started, never depend on it: the fuel system is wearing down as you drive.
- Two jobs, diesel: it combusts, and on the way through it keeps your high-pressure pump and injectors lubricated. Petrol only handles the one. That is why your ignition is left off as well — flick it on and you often prime your system, and that is petrol exiting that tank for exactly those parts.
- Don't tip diesel on top to dilute it. A diesel fuel system doesn't cope with petrol by percentage the way that advice implies, and topping up clears nothing — it just hands you a bigger tank of the same blend. The type makes no difference either: super unleaded is just petrol.
- Stay put if it is safe to. Hazards on, motor off, keep the car. Wherever you have stopped — the verge on Quarryside Drive, anywhere — an awkward spot for us is better than a started motor, and nothing is quicker for us to sort than a motor that never moved.
- Before you ring, have your whereabouts. Anything nearest to you with a name on it, plus a postcode beginning L33 6 — that's what determines whether the van turns up or circles.
- What got in, roughly how many litres, and whether the car has started — the three facts decide the full visit. Phone 0333 366 0103 and tell us.
How far you drove is what our technicians query, not how long the car has been stood — and here is why. Diesel does two jobs on its way through a motor: it ignites, and before burning it lubricates that high-pressure fuel pump and the injectors. Petrol handles the first only. So a fast refuel on the drive in, the realisation coming around eleven, and a diesel Volkswagen Golf standing at Headbolt Lane since quarter past eight shows those few miles were covered with your pump labouring on a fluid drained of most of its protection. Phone us then keep the car precisely where it stands.
Petrol in your Renault Megane, and it takes diesel? Shopping in your boot, you at Morrisons, somewhere around Northwood? Then phone, and leave the engine out of it — not even to leave the bay. Someone comes out to you. Tank drained, fuel lines purged, clean diesel in, and home you go. Gentle throttle over a mile draws little, so these are often the simple jobs.
Diesel has to be heavy enough to seal the close-fitting components it flows through, and petrol thins it. That is the whole process, and it accounts for the normal Mullberry Park Walk call: a diesel Nissan Qashqai that drove out there without fuss 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 your fuel to hold pressure, not only to burn — so when the fuel weakens, pressure that should build then stay built starts bleeding past clearances instead, and your engine gets a weaker, later, less even delivery than it was designed about. None of that is the motor failing, which is the bit worth hearing: it's the fuel no longer behaving like diesel, and it stops when the fuel is corrected.
Rattling, an uneven idle, white smoke, a throttle gone dead. That's a misfuelled diesel Ford Focus telling you what is wrong. Turn off where you have stopped, by AXA Training Centre or anywhere else, and never restart the car to find a better spot.
It got a few streets and stopped. The throttle went dead, your idle turned ragged, and your diesel Dacia Duster is now waiting by St Mark's Church. That deadness is your fuel failing to build pressure properly instead of your engine packing up — and since there's no warning for it, cars in that position usually get driven once more before anybody calls. Don't. Turn it off and phone us.
Draining petrol from a diesel on a forecourt
The job begins at a forecourt, typically. Often enough it wraps up at one too. If you are still on the forecourt at the nearest petrol station, that's generally where the drain takes place — we operate on garage forecourts regularly, with the site's agreement.
At a forecourt, it is stopped with your motor never started, and no place else does that. The few seconds between reading the till receipt and reaching for the keys decide how much needs rinsing. Anywhere other than a forecourt — a car park, a driveway, a lay-by — your car was switched on and driven to get there, so fuel was drawn from your tank, through your filter then into the high-pressure pump. That means the fuel lines and the filter require flushing as well as that tank. It's not a catastrophe, and our engineers can still sort it out where the vehicle stands.
Push it out of the way if the staff suggest it, and they generally will. The next driver gets past the petrol pump, and that is worth doing. Four car lengths is not worth a restart.
Areas we reach in Northwood
As a residential suburb, Northwood sees a regular visit, while its neighbours close by go along on the same run: Tower Hill and Kirkby, Southdene and Westvale, Kirkby Park.
Our engineers do come. The places above are just the closest neighbours, and a page exists for most towns across Merseyside, so an absence from the list is not an absence from our coverage. Contact us and check instead of assuming, above all when you are on a border or anywhere a satnav gets wrong.
See the map for the area included on this page. Kerbside, forecourt, private drive, car park: every bit of that is territory our engineers serve, and none of it requires your car to move to us.
Broken down by the kerbside around Northwood
Not everyone has the chance to pull in anywhere sensible. If you noticed after setting off and finished up along the verge on Minstead Avenue, or at a lay-by somewhere with the hazards on, that's a common call for us rather than an odd one.
Whether you wait beside the vehicle or move away from it rests on whether sitting in it looks sensible. Don't restart it to get to a better location. It will go — a diesel on petrol generally obliges — and each mile of obliging draws the mixture deeper into the system. However inconvenient the location, it is no problem for us to get to it, and that's a lot better for the vehicle than pressing on.
Run it already? Pull over, then see below
This is where your M57 comes into it — under 3 miles away from Northwood. Some way along, and onto it in the first place: a misfilled diesel will often do both before anything feels wrong. What you get then is rarely a neat stop. Power falls away, the idle goes uneven, and there may be some smoke.
Take the first exit that is sensible, pull up there, and don't start the car to move it. Long run? Anything approaching the under 10 miles to the nearest city and you should suppose the lot — filter, pump, injectors, all of it got to by the mixture. Say that on the phone, as it changes what goes in our van.
About Northwood
Northwood is a suburban area in Merseyside, located approximately 6.7 miles from Liverpool, and sits at an elevation of 36 metres in the inland landscape of the North West region. Northwood is characterized by its predominantly terraced housing stock, which reflects the typical residential architecture of the surrounding area. Northwood is situated near other local places, including Tower Hill, Kirkby, and Southdene, and is home to a population of around 6614 people.
What our engineers do when our technicians get to you around Northwood
- We ask first, quote after. What was put in? How much? Has the engine run? Those answers change what the work actually is.
- Out goes the tainted fuel.
- We rinse the lines and clear the fuel filter, and so what is remaining in the fuel system isn't what caused the issue.
- New diesel goes in, and then the system gets bled.
- Once it's turned on, our engineers check it runs properly on new diesel.
From there, you are ready to set off. All of this is done where your car is, so it never has to be taken to a garage, and when it has been noticed soon, permanent damage is very rare.
AdBlue in the diesel tank by mistake, around Northwood?
AdBlue rather than petrol? Then the first rule is unchanged — your engine stays off — whereas the problem beneath it's a distinct one altogether. The protection a fuel system relies on is taken away by petrol, which weakens the diesel. Urea dissolved in water, AdBlue, and in a diesel tank that brings rust and build-up.
Usually the more serious of the two, AdBlue — and the detail sits on its own Northwood page. Both are ours to deal with.
Northwood prices for a petrol-in-diesel fuel drain
What moves the figure is set out below, because the job is not one job and our technicians can't truthfully put a single figure on this page.
- Whether your motor has been run or driven. This is the main one.
- Wrong fuel in, against what that tank takes — that ratio.
- Whether it's unleaded or AdBlue.
- Whether our van can sensibly reach your car and work on it, which hinges on where your vehicle is.
Tell us what the car is, how much got in, and if your engine has run. A straight answer comes back, not a range. If it is not time-critical — the car is at home and going nowhere — works too.
Questions our technicians get about petrol in diesel in Northwood
I am on a forecourt around Northwood. Can you drain the vehicle here?
A fair portion of this work happens there, so yes. Often, provided the site agrees: Morrisons, plus every other forecourt nearby. Say on the phone where exactly you have stopped. Whether our engineers can work in that place is something our engineers answer on the spot.
How much petrol in a diesel is too much?
Litres are not the measure. Proportion is, and a lot more than either, it counts if anything has been run. Five litres in an almost empty tank is a separate situation from five in a full one — but either way, the thing that decides how much work is needed is whether that blend has been sucked through your fuel system.
I drove the vehicle after putting petrol in my diesel. Now what?
Turn off somewhere sensible, and keep it that way after you stop. Driving takes the problem along — out of that tank, into your pump and injectors. Motorists fear it a good deal more than the recovery rate warrants, mind. The one truly useful thing left to you isn't restarting the vehicle.
My warranty — does a fuel drain void it?
A manufacturer's warranty withstands a drain then flush done to a correct standard, which is no alteration at all. What is likelier to start a dispute is a diesel that has been run on petrol. One more good reason for the engine to remain off.
Can I just add two-stroke oil and drive home?
No. It belongs to a distinct problem from a different era, and petrol has weakened something no oil of that kind puts back. After that? Still petrol in the tank, and a pump that has to cope with the stuff.
Does petrol in a diesel have to go to a main dealer?
You do not need one. The vehicle is drained and cleaned wherever it is, with no need to bring it to a franchised dealer.
Is the car still with you?
Keep it switched off.
Driven it already? Then somewhere safe, stop, turn off, and no restarting the car afterwards. A still, cold vehicle is the best place to be in, and this is recoverable from much more regularly than people assume.
Mobile fuel draining around Northwood and throughout Merseyside — at the kerbside, on the forecourt or at home.