--- title: AdBlue in a Diesel Tank Monger: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/monger-somerset/ location: Monger county: Somerset latitude: 51.295900 longitude: -2.489350 service: AdBlue in a Diesel Tank updated: 2026-10-27 --- # Avoiding AdBlue in a Diesel Tank in Monger: Why It Happens Stop reading for a moment when the diesel tank already has AdBlue in it: ignition off, motor off, and phone 0333 366 0103. In Monger, catching it before your engine runs normally leaves a drain and a thorough flush where it stands. The remainder of this page covers why it takes place and how to ensure it doesn't — useful if you are reading before it has happened. ## Two fillers, two tanks: AdBlue in a diesel vehicle Not one fluid but two: that is how many modern diesels around Monger and Belle Vue carry, with diesel for the motor. AdBlue's own tank holds it, and from there it goes to the exhaust, where a spray treats the fumes. Each tank has its own filler. Some motors put the AdBlue filler in the boot or under the bonnet; plenty of others place the two together under one flap. The diesel side is topped up at the petrol pump all the time. Far less frequently, the AdBlue side gets topped up — normally from a bottle, by a person thinking about where it goes. That gap is where the slip lives. ## Monger: how AdBlue in the diesel tank happens Carelessness rarely causes it. What does is three things lining up at once. The warning comes first. As AdBlue runs low your car tells you, and if it runs out completely, the car drops into limp mode. So the top-up is done in a hurry: on a drive off Monger Lane before work, or in the car park outside Dolphin Inn on the way home. New-to-you vehicles are second, too. Hire cars, new cars and company cars place their fillers in new places, and habit goes for the cap used on the old one. Lastly, the bottle fits: a diesel filler or AdBlue one, it goes in as easily, and once the pour begins, nothing stops it. It takes a few seconds, be it out in Greenhill or right in the heart of Monger. ## How to tell the AdBlue filler from the diesel one Look at these before pouring, on a forecourt in Monger or a driveway over in Hayes Park. A few seconds, no more. - Read the cap instead of going by position: AdBlue caps are regularly blue or marked "AdBlue", and diesel caps normally aren't. - Many cars fit AdBlue the smaller filler of the two. - The flap. Look inside the fuel flap for a label. Many motors say there which fuel goes where. - The handbook says where it is when your filler is not next to your diesel cap: your boot, or under the bonnet. - 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 at Oldfield Park. ## AdBlue top-ups that never reach the diesel tank Anywhere around Somerset the light comes on, this is a routine for that day. - Park and switch off. Not on a slope, not with your motor running, and not in a rush on the side of Somer Ridge. - Daft as it sounds, saying "AdBlue" out loud as you unscrew the cap does the trick — once you've located the filler and read the cap. - The diesel cap remains on. When the two share a flap, make sure it is shut before the bottle comes up. - Gently is best, through the bottle's own spout, until it's full or the bottle is empty. - Close the cap, and look once more — making sure your diesel cap stayed closed the whole time. Only then, start the car. Discover at the second or third stage that the bottle went into the wrong filler? That's where you stop. Leave out stage five altogether. ## Already put AdBlue in the diesel tank around Monger? Short order, then. First: your motor stays unstarted. Keep your ignition off too, since on plenty of diesels it alone runs your pump. AdBlue does not mix with diesel — it sinks to the bottom of that tank, where the fuel is drawn from — so don't top up with diesel to dilute it. If you are on a forecourt, whether it's the Tesco or the Esso, ask the attendants to help roll your car clear of the petrol pump. Your own driveway in Monger is where it stays. Stop as soon as it is safe and switch off, if the engine has already run. On the M32, under 15 miles from Monger, that means the next exit. A short hop across Monger is a smaller job than a run towards Bath, under 10 miles away, so tell us about how far it went. ## What happens when our engineers arrive around Monger Our van comes to the vehicle anywhere it stopped — your own driveway, near Welton Baptist Church, or outside Midsomer Norton Primary School. The replies settle this work and our quote, and so we ask what was put in, about how much, and whether it has run. That price comes over the phone, ahead of any van leaving. Then that tank is drained and the fuel system rinsed thoroughly. Unlike petrol, AdBlue leaves crystals and eats at some fuel-system metals, and neither clears out by itself. That is why it matters more. After the fuel filter has been flushed — or renewed, if required — fresh diesel goes in, and finally the car is tested. Before we go, we fire it up and confirm that it is running correctly. With pumps fine on a working forecourt and quiet enough for use outside a house at night, most jobs where your engine has not run need roughly half an hour once our engineers arrive. The insurer will ask for an engineer's report and the VAT invoice, and both are yours once the job is done. Payment comes on the day, with no money upfront. It is worth checking your insurance while we travel to you: misfuelling cover comes with plenty of policies. ## About Monger, briefly Monger is a suburban area situated on the riverside in Somerset, with a mix of detached housing and local amenities. Monger sits near the city of Bath, approximately 8 miles away, and is close to nearby places such as Greenhill and Thicket Mead. Monger has a population of around 2779 residents and is located at an elevation of 132 metres. Monger is part of the wider South West region, about 103 miles from London. ## AdBlue drains in Monger and across Somerset Thicket Mead and Winterfield are among the towns around Monger, a residential suburb, that the same teams cover, throughout BA postcodes. A postcode starting BA3 2 gets our van to you fastest. The car remains where it is. The drain takes place on the spot, whether a drive, a street near The Salvation Army, or a lay-by towards Paulton Rovers Football Club. Awkward to pin down, like the back of Midsomer Norton Children's Centre? Close to a border? Asking is better than guessing, so phone. ## In short, for Monger motorists Before you tip, read the cap. If AdBlue has gone in the diesel tank all the same, leave the car off then phone 0333 366 0103. Petrol in Diesel clears it where it stands, anywhere around Somerset.