--- title: AdBlue in a Diesel Tank Wednesbury? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/wednesbury-west-midlands/ location: Wednesbury county: West Midlands latitude: 52.552050 longitude: -2.018690 service: AdBlue in a Diesel Tank updated: 2026-10-22 --- # Wednesbury: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? If AdBlue is already in your diesel tank, stop reading for a moment: leave the motor and the ignition off and ring 0333 366 0103. Normally, when your motor has not run, it is drained and thoroughly flushed where your vehicle sits around Wednesbury. The remainder of this page explains why it occurs and how to make sure it does not — handy if you are reading before it has happened. ## AdBlue in a diesel motor: two tanks, two fillers Plenty of newer diesels on the roads round Wednesbury and Mesty Croft carry two liquids, not one. Diesel goes to the engine. The exhaust, not your motor, is where AdBlue goes: dosed into the fumes to clean it, from its own tank. Every tank has a filler of its own. Some vehicles keep the AdBlue filler in the boot or under the bonnet; a lot more place the two side by side behind one flap. The diesel side is filled at the petrol pump all the time. Far less commonly, the AdBlue side gets filled — normally from a bottle, by someone thinking about where it goes. The mistake lives in that gap. ## How AdBlue in the diesel tank happens around Wednesbury Three things tend to line up, and carelessness is seldom one of them. First, the warning. Low AdBlue brings a message from your car, and running dry means limp mode — so a rushed top-up, maybe before work off Market Place, perhaps at Golden Cross on the way home after work. Then the car is unfamiliar. A hire car, a new motor or a company car puts the fillers where your last one did not, and your hand gets to for the cap it would have used on the old one. Third, the spout fits: a diesel filler or AdBlue one, it goes in as readily, and once the pour begins, no part halts it. Oakeswell End or the heart of Wednesbury: it is the same few seconds either way. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a driveway in Balls Hill or a forecourt in Wednesbury, check these. They take a couple of seconds. - Blue and lettering: an AdBlue cap is commonly blue, or says "AdBlue", where a diesel cap usually does not. Go by the cap, not where it sits. - Many cars fit AdBlue the smaller neck of the two. - Open the filler flap and look for a label — plenty of vehicles mark which goes in each inlet just there. - In the boot or under the bonnet: that is where the filler sits if it's not by your diesel cap, and the handbook says which. - Ask the person who drove it last — before you leave, not when the light comes on — if you pick up a hire or company car from somewhere like the car park outside Bescot Stadium. ## How to top up without AdBlue in your diesel tank Wherever around West Midlands the light comes on, this is a routine for that day. - Pull in somewhere level, engine off, with time to spare — never hurried on the side of Ridding Lane. - Say "AdBlue" out loud as you unscrew the cap, once finding the AdBlue filler and reading it. Silly, perhaps, yet it does the trick. - Leave the diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle. - Finish when that tank is topped up or the bottle runs dry; until then, tip slowly using its own spout. - Close the cap, then check again — confirm your diesel cap stayed shut the whole time. Only then, start the vehicle. Spot at stage two or three that it has already gone into your diesel side? So stop right there. Skip stage five entirely. ## Wednesbury: already put AdBlue in the diesel tank? Then the order of things is short. Do not start the motor. Keep your ignition off too, since on many diesels switching it on by itself starts your pump. AdBlue doesn't mix with diesel — it sinks to the bottom of that tank, where your fuel is pulled from — so don't top up with diesel to dilute it. The attendants at Morrisons, Esso or any forecourt will normally help pushing the vehicle clear if asked. Your own drive in Wednesbury is where it stays. Already run? Pull over once it's safe, then turn off. The next exit is the place to come off when you are on the M6, under 3 miles from Wednesbury. Distance counts — a short hop across Wednesbury makes a smaller job than heading under 10 miles towards Wolverhampton — so tell us roughly how far it went. ## When we turn up in Wednesbury, what happens? Outside St John's Church of England Primary Academy, near Market Place or on your own drive: wherever the car has stopped, our engineers come to it. Our technicians ask what was put in, about how much, and if it's run, because those replies determine the work and the quote. That price is given on the call, ahead of any van leaving. Next: a drain, then a full flush of the whole system. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it does not wash out on its own. Once your filter is flushed — or replaced, where needed — fresh diesel goes in, and then the car is tested. We do not leave until it has been started and is running smoothly. If the engine has not run, the majority of jobs take about half an hour once we're there, using pumps that are fine on a busy forecourt and quiet enough to use outside a house after dark. Nothing in advance; you settle up on the day. Afterwards, a VAT invoice and a report from the engineer go to you for the insurer. It's worth checking your insurance while we travel to you: misfuelling cover is included with many policies. ## About Wednesbury and where it is Wednesbury is a town in the West Midlands, situated on the River Tame at an elevation of 142 metres. Wednesbury lies approximately 5 miles southeast of Wolverhampton and 108 miles northwest of London, with nearby neighbourhoods including Oakeswell End and Vicarage. Wednesbury has a population of around 25,125 people, predominantly living in semi-detached housing. Wednesbury's riverside setting has influenced its development over time, with the town expanding along the river valley. ## AdBlue drains across West Midlands, Wednesbury included Vicarage and Church Hill are among the places near Wednesbury, a riverside town, that the same teams cover, over WS postcodes. A postcode starting WS10 7 gets the van to you fastest. Your car stays where it is. The drain happens on the spot, be it a driveway, a street near Jami Masjie Islam Centre, or a layby towards Wednesbury Market Place Conservation Area. If you're close to a boundary, or somewhere hard to explain like the back of Union Junction Market, ring and ask instead of guessing. ## The short version for Wednesbury motorists First, the cap; after that, the pour. AdBlue in the diesel tank regardless? Leave it off then phone 0333 366 0103; Petrol in Diesel empties it where it stands, across West Midlands.