Don't Start It: AdBlue in a Diesel Tank in Milcombe
If AdBlue has gone into your diesel tank, leave your motor off and keep your ignition off. In plain terms, AdBlue is just urea in water. Unlike fuel, it neither burns nor mixes, and nothing happens until your motor pulls it round. Caught before your engine has been run, AdBlue in a diesel tank is normally a drain and a thorough flush, done where the car is around Milcombe. Before anything, ring us on 0333 366 0103.
Your next steps right now, Milcombe: AdBlue in your diesel tank
To do:
- Keys out — that way no one can switch anything on.
- Hazards on, if moving traffic is at all near.
- Which fluid, and roughly what volume? Hang on to the bottle or the receipt, and our technicians can see.
- Ring just where you are. Quote a OX15 4 postcode or the closest street name, and no one has to hunt for you.
Things not to do:
- Shifting your car just a short way is no reason to start your motor.
- Your ignition remains off: on lots of diesels, turning it on is enough to start your fuel pump.
- No extra fuel on top. The AdBlue will not blend, and so it's wasted.
- Even a short distance along Horton Lane is too far to drive it.
- Beside the road, do not try emptying it on your own.
Rolling the vehicle off the island is a job for attendants to help with, whichever Milcombe forecourt you are on, the BP included. Parked on your own drive? Then it stays just as it is.
What AdBlue does in a diesel tank
AdBlue is made for your exhaust, not the motor. Its own reservoir holds it, and from there it's fed into the exhaust, where it treats the gas. No part in a fuel pump is made for this fluid — and no part of it was meant to go through one.
Inside a diesel tank it behaves really differently from fuel. It doesn't mix in. It is heavier than diesel, and so it sinks and gathers at the bottom of the tank, which is where the pickup sucks fuel from. A vehicle filled on a driveway in Lower Tadmarton overnight and not started since is the straightforward case. No pump has pulled the AdBlue up yet — but when your engine turns, that's what is pulled first, directly from the bottom of your tank.
It does two kinds of damage from there. Crystals and corrosion. As the water dries, it leaves urea that crystallises in filter elements and narrow passages; and, because it attacks certain metals, every part it reaches suffers for as long as it stays inside. Where the AdBlue has reached the pipework, waiting overnight around Milcombe leaves things worse. In your tank only, time does nothing. The water in it causes harm of its own: your high-pressure pump and your injectors depend on diesel to lubricate them, and water offers them nothing.
Why is AdBlue in a diesel frequently the bigger issue?
Fill a diesel with petrol in error at the Esso, and the issue is thinned fuel. No damage is done while it stays unused, mixed into your diesel — only when your motor works on it.
With AdBlue in a diesel, the fluid itself is simply the wrong one. It cannot just be run through, because it does not burn. Crystals and corrosion remain after the next tankful, and AdBlue separates again from the diesel, and so thinning it won't work. That is why the flush counts more, and trying your engine "to see" does more harm with AdBlue than nearly any other mistake — in Wigginton or the centre of Milcombe alike.
The good news is the same as with petrol. Anywhere across Oxfordshire the car has come to rest, an unrun engine leaves the AdBlue still inside the reservoir: the simplest part of any fuel system to empty.
AdBlue in a diesel tank around Milcombe: how it ends up there
Many motors place the AdBlue cap alongside the diesel one, occasionally under one flap, and in dim light the two can look identical. Nobody means it. A bottle picked up while heading home and tipped in at home, rather than at the filling station, is the usual story.
It tends to take place in a couple of familiar ways. Midway through the drop-off, the dashboard flags it up, and outside Bloxham Church of England Primary School the refill is hurried. Someone tips the container in outside their house, right off Bloxham Road, as the day ends. Otherwise, after dark by Horse & Groom Inn, your vehicle gets topped up by someone opening that flap for the first time.
The least familiar vehicles get it most — rentals, brand-new cars, company cars, and the other car in a home with one of each fuel types. Same mistake, an identical first response — leave it switched off — wherever you happen to be around Milcombe or the rest of Oxfordshire.
Already started the engine with AdBlue in the diesel tank around Milcombe?
Then your tank is no longer where the AdBlue is. It's been pulled through the filter and the lines, and if your motor ran for any time, it has got to the high-pressure fuel pump and the injectors.
You may notice your engine running roughly, smoking, losing power, showing warning lights or cutting out, perhaps on the way back from Slade Nature Reserve or halfway across Milcombe. No starting it again to test: pull over once it is safe, then turn everything off. Each start pulls more of that through.
On the M40, under 5 miles from Milcombe, the next junction is where to leave, and somewhere sensible is where to stop — not carrying on.
Each mile carries the AdBlue further in. That's why a hop across Milcombe to park beside Milcombe Village Hall and a drive of under 25 miles for Oxford are such distinct jobs. Let us know roughly how far it had come.
Once the engine has run, the flush includes more, and all of it is done where the car has stopped. Very rarely does it leave long-term damage if it is caught quickly.
What draining AdBlue from a diesel involves around Milcombe
The vehicle remains where it is, whether that's a road near St Laurence, a driveway, a layby or a filling station in Milcombe, and the van comes to it. The work rests on three replies, and our engineers ask for before all else — what got in, the amount, and if the motor has turned over.
On the spot, your tank is then emptied, and all of the contaminated diesel and the urea leave at once. What remains from AdBlue will not wash away unaided, so the fuel system gets a full flush, which matters far more with urea than with petrol. The fuel filter is flushed, or replaced where it needs to be; fresh diesel goes in; and the vehicle is tested. About half an hour on site is usual for most jobs when the engine has not run. Explosion-proof pumps make a busy forecourt safe to work on, and they're quiet enough not to disturb the street at night.
Priming the system with clean diesel comes last. Whether it is a parking bay outside Banbury or a drive in Milcombe, that is where our technicians start the engine and you drive off. It is checked on fresh diesel to make sure it runs smoothly before our engineers go. As the job is done in its entirety where your car is, a workshop never comes into it. The insurer will want an engineer's report and the VAT invoice — both yours once the job is done.
About Milcombe and where it is
Milcombe is a small village in Oxfordshire, situated inland at an elevation of around 133 metres. Milcombe lies approximately 18.8 miles from Oxford and 64.5 miles from London, with nearby villages including South Newington and Bloxham. Milcombe has a population of around 733 people, with semi-detached housing being the predominant type. Milcombe is surrounded by rolling countryside, typical of the South East region.
AdBlue drains around Milcombe and across Oxfordshire
South Newington, Bloxham and High Meadow View are among the towns around Milcombe that the same vans serve, together with much of Oxfordshire further out, over the OX postcode area. Phone and ask rather than guess when you are by a county line, or somewhere awkward to explain.
No moving is needed. In Milcombe, a rural village, a mobile service works: your car is drained where it stands, be it in a drive, a side street, a parking area or a filling station.
Milcombe: what AdBlue in a diesel tank costs to fix
No single figure could be honest, since every job is different. Whether your engine has run, and for how long, comes first in what moves the cost. How much AdBlue got in comes next, and then the position of the vehicle, because an open drive is easier for our van to get to safely than a tight gap behind Saint Peter ad Vincula.
That is why every call from Milcombe starts with the same three questions, asked before giving a figure, not after: what was put in, how much, and if it's run. The replies turn a range into a straight quote.
Before anyone heads out, you are told our quote on the phone. Then you pay on the day, by card or by phone, with nothing upfront. While the van is on the way, dig out your policy: plenty cover misfuelling.
Milcombe: still beside your car?
Leaving your vehicle alone is, then, the most useful thing you can do. Engine off, keys out, ignition off. Petrol in Diesel takes over the rest, in Milcombe or wherever in Oxfordshire, once you phone 0333 366 0103 to say it's AdBlue, roughly what quantity, and if the engine ran.