AdBlue in a Diesel Tank in Maidenhead: Why It Happens and How to Avoid It
Stop here a minute if your diesel tank already has AdBlue in it: ignition off, engine off, and call 0333 366 0103. Caught before the engine runs, it is usually a drain and a thorough flush, done where your car is around Maidenhead. If you are reading before it has happened, the remainder of this page is about why it happens and how to make sure it doesn't.
AdBlue in a diesel motor, and its separate tank
Plenty of newer diesels on the roads around Maidenhead and Furze Platt carry two liquids, not one. Diesel goes to the engine. The exhaust, not the engine, is where AdBlue ends up: sprayed into the fumes to fresh them, from a separate tank.
There's a filler for every tank. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. Diesel goes in at each forecourt call-out, week in, week out. Much less regularly, the AdBlue side gets topped up — mostly from a bottle, by a person thinking about where it goes. The slip lives in that gap.
How AdBlue in the diesel tank takes place around Maidenhead
It is seldom carelessness. Three things tend to line up.
Hurry follows from the warning. The car tells you as AdBlue runs low, and an empty tank sends the vehicle into limp mode — so the top-up happens quickly, before work on a driveway off Queen Street, or on the way home in the car park outside The Maiden's Head.
Then, your hand reaches for the cap it would have used on the old motor — because a rental car, a new vehicle or a company car puts the fillers where your last one didn't.
No part halts the tip once it has started, because a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. North Town or the heart of Maidenhead: it is the same few seconds either way.
The AdBlue filler and your diesel filler: telling them apart
Look at these first, at a forecourt around Maidenhead or a driveway over in Bray. A few seconds, no more.
- Check the cap rather than going by where it sits: AdBlue ones are commonly blue or marked "AdBlue", and diesel ones usually aren't.
- Plenty of cars fit AdBlue the smaller neck of the two.
- Open the flap and look for a label — plenty of cars mark what goes in which filler just there.
- In the boot or under the bonnet: that's where the filler is if it's not by your diesel cap, and the handbook tells you which.
- Ask the person who drove it last — before you leave, not when the light comes on — if you collect a hire or company car from somewhere like the car park outside the nearest station.
Keeping AdBlue out of your diesel tank when you top up
Anywhere in Berkshire the light comes on, this is a routine for the day.
- Turn off once parked — flat ground, engine stopped, and never rushed by High Street at the roadside.
- Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds daft and it works.
- The diesel cap stays on. Where both share a flap, make sure it's shut before lifting the bottle.
- Finish when that tank fills or the bottle is empty; before that, tip slowly through its own spout.
- Close the cap and check again. Make sure your diesel cap was never opened. Only then start the car.
Stop there if you find, at stage two or three, that you've already poured into your diesel side. Step five stays off limits.
Maidenhead: already put AdBlue in the diesel tank?
Then the order of things is short. Don't start the engine. Do not switch your ignition on; on plenty of diesels that alone runs the fuel pump. Filling up with diesel will not thin it: rather than mixing, AdBlue drops to the base of the tank, right where the fuel is drawn from.
If you are at a forecourt, whether it is the Esso or the Texaco, ask the staff to help push the car clear of the pump. At home in Maidenhead? Then the vehicle remains put.
If your motor has already run, stop as soon as it is safe and switch off. Maidenhead lies under 3 miles from the A404(M); there, use the first exit. A short hop across Maidenhead is a smaller job than a run towards St Albans, under 25 miles away, and so tell us about how far it went.
Maidenhead: what happens when our engineers get there
Our van comes to the vehicle anywhere it has come to rest — your own drive, beside Marks & Spencer, or outside St Luke's CofE Primary School. The replies determine the work and the quote, and so our technicians ask what got in, roughly how much, and whether it has run. On the phone call itself, you hear our price — ahead of dispatch.
Draining that tank comes next, then a thorough flush of the system. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. The fuel filter is cleaned, or replaced where it needs to be; fresh diesel goes in; and your car is tested. Before we leave, our technicians start the car and confirm that it's running properly.
Unstarted vehicles usually mean a half-hour visit after the moment we arrive. The kit is fine on a live forecourt, and hushed enough for a residential street after dark. Payment happens on the day, not upfront, and you are given the paperwork an insurer wants: an engineer report and a VAT invoice. Plenty of insurance policies include misfuelling cover, and so it's worth checking yours while we are on the way.
About Maidenhead, briefly
Maidenhead is a town situated in a picturesque riverside location in Berkshire, England. It is positioned on the River Thames, which also marks the boundary with neighbouring Buckinghamshire. The town is within commuting distance of London and Reading, making it an attractive base for those working in these cities. Maidenhead boasts a charming setting and a rich history as a market town.
AdBlue drains across Berkshire, Maidenhead included
Over SL postcodes, the vans that cover Maidenhead — a riverside town — work the surrounding locations too, Fishery and Boyn Hill among them. Quote a postcode that starts SL6 1, and the van gets there quickest.
Moving the vehicle is not needed. The drain takes place on the spot, whether a driveway, a road by Racks, or a layby on the way to Maudsley Memorial Gardens. If you're near a border, or somewhere hard to explain like the back of Maidenhead Town Hall, ring and ask rather than guessing.
Maidenhead people: the short version
Always, the cap; then, the tip. Petrol in Diesel empties it on the spot, anywhere in Berkshire, if AdBlue has gone in the diesel tank regardless — and so leave the car off and phone 0333 366 0103.