--- title: Causeway Green: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/causeway-green-west-midlands/ location: Causeway Green county: West Midlands latitude: 52.482660 longitude: -2.017510 service: AdBlue in a Diesel Tank updated: 2026-10-23 --- # Avoiding AdBlue in a Diesel Tank in Causeway Green: Why It Happens If AdBlue is already in your diesel tank, stop reading for a moment: leave your engine and your ignition off then phone 0333 366 0103. In Causeway Green, catching it before the engine runs usually means a drain and a full flush on the spot. If you are reading before it has happened, the rest of this page is about why it happens and how to make sure it does not. ## AdBlue in a diesel car: two tanks, two fillers No single fluid but two: that is how plenty of newer diesels near Causeway Green and Langley carry, with diesel for your engine. Your exhaust, not the engine, is where AdBlue goes: sprayed into the fumes to clean it, from its own tank. Different tanks, different fillers. Other cars keep the AdBlue filler in the boot or under the bonnet; plenty of others place the two together under one flap. At the petrol pump, the diesel side is topped up constantly. Seldom filled, AdBlue normally goes in out of a bottle, tipped by someone who has to stop and think which cap it needs. The mistake grows in the gap between them. ## How AdBlue in your diesel tank takes place in Causeway Green Carelessness seldom causes it. Instead is three things coming up at once. On a drive off Causeway Green Road before work, or in the car park outside The Old Dispensary Microbar on the way home: that's where the rushed top-up happens. What is the reason for the rush? As AdBlue gets low your car warns you, and once it is gone, limp mode kicks in. The old car's cap is where the hand reaches — yet a hire car, a new motor or a company car puts the fillers somewhere else. That is a second factor: an unfamiliar vehicle. No part stops the tip once it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Titford or the middle of Causeway Green: it takes the same few seconds either way. ## Telling the AdBlue filler from your diesel filler Check these first, on a forecourt around Causeway Green or a drive over in Langley Green. A few seconds, no more. - The cap. The AdBlue cap is often blue, or marked "AdBlue". The diesel cap usually isn't. Read it rather than going by where it sits. - On plenty of motors, size tells: AdBlue gets the smaller filler neck. - The flap. Look inside your fuel flap for a label. Plenty of motors say there which fuel goes where. - Can't find it beside the diesel filler? In that case check below the bonnet or inside the boot — the handbook will say where. - Picking up a hire or company car, say at the car park outside Rowley Regis? Check with the person who drove the vehicle last before you set off, rather than once the light goes on. ## How to top up without AdBlue in your diesel tank Wherever in West Midlands the light comes on, here is a routine for that day. - Turn off once parked — flat ground, motor stopped, and never rushed by Ashes Road at the roadside. - Find the AdBlue filler, read the cap, and speak the word "AdBlue" aloud while you unscrew it. It seems daft. It does the trick. - The diesel cap stays on. Where both share a flap, confirm it's closed before lifting the bottle. - Slowly does it, through the bottle's own spout, until it is full or the bottle runs out. - Close the cap, then check once more — confirm your diesel filler remained shut throughout. After that, start the vehicle. If at step two or three you find you have already poured into the diesel side, stop there. Do not go on to stage five. ## Causeway Green: already put AdBlue in the diesel tank? What follows is a short order of things, beginning with no starting the motor. Don't switch your ignition on; on plenty of diesels that alone runs the fuel pump. Topping up with diesel will not thin it: rather than mixing, AdBlue sinks to the base of the tank, just where fuel is drawn from. If you are on a forecourt, whether it's the Texaco or the Murco, ask the attendants to help push the car away from the petrol pump. Leave it where it is if you're on your own drive around Causeway Green. If your motor has already run, stop as soon as it is safe and switch off. On the M5, under a mile from Causeway Green, that means the next exit. A short hop across Causeway Green is a smaller job than a run towards Birmingham, under 5 miles away, and so tell us about how far it went. ## Causeway Green: what takes place when our technicians turn up The van comes to the car anywhere it has come to rest — your own drive, near Causeway Green Methodist Church, or outside Causeway Green Primary School. What fluid went in, the amount, and if it ran: our engineers ask since those answers decide both work and price. The price comes on the call, ahead of any van leaving. Then your tank is drained and the fuel system rinsed thoroughly. 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 doesn't wash out on its own. The fuel filter is flushed, or replaced where it needs to be; clean diesel goes in; and the car is tested. Next our technicians fire it up and confirm it runs correctly before we leave. Unrun cars usually need a half-hour visit after the moment we arrive. The equipment is safe on a live forecourt, and quiet enough for a residential street late at night. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. While we travel, take a look at your policy; many carry cover for misfuelling. ## About Causeway Green and where it is Causeway Green is a suburban area in the West Midlands, situated near the lakes and canals that crisscross the region. Causeway Green sits at an elevation of around 165 metres, close to the city of Birmingham and near neighbouring areas such as Titford and Bristnall Fields. Causeway Green is characterized by its semi-detached housing stock and its proximity to the urban centre of Birmingham, which is approximately 4.8 miles away. Causeway Green is also part of the larger West Midlands conurbation, with London around 105 miles to the southeast. ## Causeway Green and West Midlands: AdBlue drains across the area Being a residential suburb, Causeway Green has the same vans as nearby areas — Bristnall Fields, Whiteheath Gate — right through B postcodes and the wider area around them. Fastest of all: quote a B68 8 postcode for our van. No need to shift the car. A drive, a lay-by on the way to The Billy Banks, a side street near Royal British Legion (Oldbury): our engineers drain it where it stands. Guessing doesn't help at the back of Countryside Trail Audio Way Markers, on a boundary, or anywhere hard to describe; ring and ask. ## Causeway Green people: the short version Tip no AdBlue till you've read the cap. AdBlue in your diesel tank regardless? Keep the vehicle off then ring 0333 366 0103; Petrol in Diesel drains it where it stands, across West Midlands.