--- title: AdBlue in a Diesel Tank Murhill: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/murhill-wiltshire/ location: Murhill county: Wiltshire latitude: 51.344820 longitude: -2.294060 service: AdBlue in a Diesel Tank updated: 2026-10-10 --- # Preventing AdBlue in a Diesel Tank in Murhill: Why It Happens If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and the ignition off and phone 0333 366 0103. Caught before your engine runs, it's generally a drain and a thorough flush, done where the car is in Murhill. Not happened yet? Further down, the rest of the page covers the reasons it takes place and the how to prevent it for good. ## Two fillers, two tanks: AdBlue in a diesel vehicle Many current diesels on the roads round Murhill and Turleigh carry two liquids, not one. Diesel goes to your motor. Kept in a tank of its own, AdBlue is fed into your exhaust gas and cleans it. Each tank has its own filler. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. Diesel gets filled at every filling station call-out, week in, week out. Far less regularly, the AdBlue side is filled — normally from a bottle, by someone thinking about where it goes. The mistake grows in that gap between them. ## How AdBlue in your diesel tank takes place around Murhill Three things tend to line up, and carelessness is seldom one of them. On a driveway off Murhill Lane before work, or in the car park outside The Seven Stars heading home: that is where the hurried top-up happens. What is the reason for the rush? As AdBlue runs low your car warns you, and if it is gone, limp mode follows. Then, your hand reaches for the cap it would have used on the old car — because a rental car, a new vehicle or a company car puts the fillers where 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 after it has started. The same few seconds settle it, in the middle of Murhill or out in Winsley. ## Telling the AdBlue filler from the diesel filler Be it a Murhill forecourt or a driveway out in Avoncliff, take a couple of seconds on these before anything is poured in. - Blue and lettering: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap usually doesn't. Go by the cap, not its position. - The size. On many motors the AdBlue filler neck is the smaller of the two. - Check inside the fuel flap: plenty of cars carry a label there showing which fuel goes where. - Cannot see it beside the diesel inlet? In that case look beneath the bonnet or in the boot — the owner's manual says which. - Collecting a hire or company car, say at the car park outside Freshford? Check with whoever drove the car last before leaving, rather than once the light goes on. ## AdBlue top-ups that never reach your diesel tank The day the light comes on, anywhere in Wiltshire, use this routine. - Turn off once parked — level ground, engine off, and never rushed beside Limpley Stoke Road at the roadside. - Silly as it sounds, speaking "AdBlue" aloud while you unscrew the cap does the trick — after you've found your filler and read it. - Leave your diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Only then, start your car: close the cap, check a second time, and make sure the diesel cap was never opened. Stop there if you find, at step two or three, that you have already poured into your diesel side. Skip stage five entirely. ## AdBlue in the diesel tank already, around Murhill? Short order, then. Top of it: the motor stays unstarted. Do not switch your ignition on; on many diesels that alone runs the fuel pump. AdBlue doesn't mix with diesel — it sinks to the bottom of that tank, where the fuel is drawn from — so do not top up with diesel to thin it. Ask the attendants to help roll your car clear of the pump if you're on a forecourt — the Essar, the Farleigh Service Station or somewhere else. If you're on your own drive around Murhill, leave it where it sits. Where your engine has run already, stop safely and turn it off. Leave the M4 — under 15 miles out of Murhill — at the first exit. Mileage counts — a short hop across Murhill is a smaller job than heading under 5 miles towards Bath — so say roughly how far it went. ## What happens when our technicians turn up in Murhill We come to the car wherever it has stopped, whether that is outside Winsley CoE VC Primary School, close to Winsley Village Hall or on your own driveway. Our engineers ask what got in, roughly how much, and whether it's run, since the replies decide this work and the quote. On the phone call itself, you hear the quote — ahead of dispatch. Then that tank is drained and your system rinsed thoroughly. Not like petrol, AdBlue forms crystals and attacks certain fuel-system metals, and neither washes out by itself. That is why it counts more. Testing comes last: before that, clean diesel goes in, and the filter is cleaned or changed as needed. The engine is started next and tested to make sure it runs smoothly, all before we head off. Unstarted vehicles usually need a half-hour visit after the moment we arrive. The equipment is safe on a busy filling station, and hushed enough for a driveway late at night. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Before we get there, have a look at your insurance documents; many include cover for misfuelling. ## About Murhill, for a moment Murhill is a small suburban area situated on the riverside in Wiltshire, with a mix of detached housing and a population of around 503 residents. Murhill sits near the city of Bath, approximately 3.8 miles away, and is close to nearby places such as Winsley, Conkwell, and Freshford. Murhill's location in the South West region of England places it about 94 miles from London, and its elevation of 109 metres gives it a gentle riverside setting. ## Murhill and Wiltshire: AdBlue drains across the area Over BA postcodes, the vans covering Murhill — a residential suburb — work the surrounding locations too, Freshford and Conkwell included. A postcode starting BA2 7 gets the van to you fastest. No need to shift your car. We drain it where it is — a side street close to St Nicholas Church, a lay-by on the way to The Tulip Garden, a drive. Tricky to explain, like the back of Tess? By a border? Checking beats guessing, so ring. ## Murhill drivers: the short version Before you tip, read the cap. AdBlue in your diesel tank after all? Keep the car off then phone 0333 366 0103; Petrol in Diesel empties it on the spot, throughout Wiltshire.