--- title: Explained: AdBlue in a Diesel Tank Mappleborough Green canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/mappleborough-green-warwickshire/ location: Mappleborough Green county: Warwickshire latitude: 52.290560 longitude: -1.883660 service: AdBlue in a Diesel Tank updated: 2026-10-18 --- # AdBlue in a Diesel Tank in Mappleborough Green: Why It Occurs and How to Avoid It If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and your ignition off then ring 0333 366 0103. Normally, when the engine hasn't run, it is drained and thoroughly purged where your car sits around Mappleborough Green. The remainder of this page covers why it occurs and how to ensure it does not — useful if you are reading ahead of time. ## Why does AdBlue in a diesel vehicle need its own filler? No single fluid but two: that is what many newer diesels near Mappleborough Green and Ipsley carry, with diesel for your engine. The exhaust, not your motor, is where AdBlue ends up: sprayed into the gas to fresh them, from a separate tank. There is a filler for every tank. Under one flap, side by side: that's the layout on many cars. Elsewhere, AdBlue's filler is beneath the bonnet or in the boot instead. At the petrol pump, the diesel side is topped up all the time. The AdBlue side is topped up far less commonly, normally from a bottle, and normally by someone who has to stop and think where it goes. Mistakes happen in the gap between the two. ## AdBlue in your diesel tank around Mappleborough Green: how it takes place It's rarely carelessness. Three things tend to line up. 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 Birmingham Road, or outside The Boot on the way home that evening. Then, your hand goes for the cap it knew on the old vehicle — since a hire car, a new car or a company car places the fillers somewhere your last one didn't. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, and so nothing stops the pour once it has started. Whether it occurs in Matchborough or the middle of Mappleborough Green, it's the same few seconds. ## The AdBlue filler and the diesel filler: telling them apart Check these first, at a forecourt in Mappleborough Green or a driveway over in Winyates. Seconds, that's all. - Check the cap rather than going by position: AdBlue ones are regularly blue or marked "AdBlue", and diesel caps normally are not. - On many cars, size gives it away: AdBlue gets the smaller filler neck. - A label inside your fuel flap often shows which fuel goes where, on plenty of vehicles. Look for it. - The handbook says where it lives when your filler isn't next to the diesel cap: your boot, or under the bonnet. - Picking up a hire or company car, perhaps at the car park at Redditch? Ask whoever drove the vehicle last before leaving, rather than once the light comes on. ## Keeping AdBlue out of your diesel tank when you top up The day the light goes on, anywhere around Warwickshire, follow this routine. - Stop somewhere level, motor off, with time in hand — not rushing on the side of Pratts Lane. - Say "AdBlue" out loud as you unscrew the cap, after finding the AdBlue filler and reading it. Daft, yes, yet it works. - The diesel cap stays on. When the two sit under a flap, confirm it's shut before lifting the bottle. - Slowly is best, through the bottle's own spout, until it is full or the bottle is empty. - Close the cap and check once more. Make sure your diesel cap was never opened. Only then start the car. Find during the second or third step that AdBlue went into the wrong filler? That's where you stop. Step five stays off limits. ## Put AdBlue in your diesel tank in Mappleborough Green already? Don't start your engine: that is where the short order of things starts. The fuel pump runs on plenty of diesels as soon as your ignition goes on — and so leave it off. AdBlue does not mix with diesel — it sinks to the bottom of the tank, where the fuel is sucked from — so don't top up with diesel to thin it. The staff at JET, BP or another forecourt will usually help pushing the car away when asked. At home in Mappleborough Green? Then the car remains where it is. When the engine has been run by now, stop somewhere safe then turn the car off. Come off the M42 — under 5 miles out of Mappleborough Green — at the first exit. Distance matters — a quick hop across Mappleborough Green makes a smaller job than driving under 15 miles towards Birmingham — so say roughly how far it went. ## Our arrival in Mappleborough Green, and what happens next By Matchborough First School Academy, close to Mapplebrough Green Village Hall or on your own driveway: wherever your car has stopped, we come to it. We ask what went in, roughly how much, and if it's run, because those answers settle the work and the price. Nobody heads out until you've heard our quote by phone. Draining that tank comes next, then a thorough flush of your system. Unlike petrol, AdBlue leaves crystals and eats at some fuel-system metals, and none of that washes away by itself. Hence it counts more. A test comes last: before that, clean diesel goes in, and the filter is flushed or replaced as needed. After that we fire it up and make sure it runs correctly before we go. Unrun vehicles usually need a half-hour visit from the moment we arrive. The kit is safe on a live filling station, and quiet enough for a residential street late at night. No money in advance; you settle up on the day. Afterwards, the VAT invoice and a report from the engineer go to you for the insurer. Misfuelling cover is included in many insurance policies — so make use of the wait to check yours. ## About Mappleborough Green Mappleborough Green is a small village in Warwickshire, situated inland at an elevation of 82 metres, approximately 13 miles south of Birmingham. Mappleborough Green is characterized by its predominantly detached housing stock and is located near other local places such as Matchborough, Washford, and Winyates Green. Mappleborough Green has a population of around 681 residents and is about 92 miles northwest of London. ## AdBlue drains in Mappleborough Green and across Warwickshire Mappleborough Green is a rural village, and our vans that cover it also work the towns near it, Washford and Winyates Green among them, across the B postcode area. Our van gets to you fastest with a postcode starting B80 7. The car stays put. A driveway, a lay-by on the way to Brookfield Plantation, a side street near Christ Church: our engineers drain it where it stands. Awkward to explain, like the back of Arrowvale Sports and Leisure Centre? Close to a county line? Asking is better than assuming, and so ring. ## In short, for Mappleborough Green people Before you tip, read the cap. AdBlue in your diesel tank regardless? Keep the vehicle switched off then phone 0333 366 0103; Petrol in Diesel empties it where it stands, throughout Warwickshire.