--- title: Explained: AdBlue in a Diesel Tank Greenhill canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/greenhill-somerset/ location: Greenhill county: Somerset latitude: 51.293920 longitude: -2.485110 service: AdBlue in a Diesel Tank updated: 2026-10-02 --- # Greenhill: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? Pause reading a minute if the diesel tank already holds AdBlue in it: ignition off, engine off, and ring 0333 366 0103. Caught before your motor runs, it's usually a drain and a thorough flush, done where the vehicle is in Greenhill. The remainder of this page explains why it takes place and how to make sure it doesn't — handy if you're reading ahead of time. ## AdBlue in a diesel motor, and its separate tank Many modern diesels in Welton, like those in Greenhill, run on two liquids; your engine gets just the diesel. AdBlue goes to your exhaust, where it is sprayed into the gas to clean it, and it lives in a tank of its own. Separate tanks, different fillers. Under one flap, next to each other: that's the arrangement on many vehicles. On others, AdBlue's filler is under the bonnet or in your boot instead. Diesel goes in on each forecourt visit, week in, week out. The AdBlue side is filled far less often, usually from a bottle, and usually by somebody who has to stop and think where it goes. The error lives in that gap. ## Greenhill: how AdBlue in the diesel tank occurs Three things tend to line up, and carelessness is rarely one of them. Hurry follows from the warning. The vehicle tells you as AdBlue runs low, and a dry tank puts the vehicle into limp mode — so the top-up gets done in a rush, before work on a drive off Welton Grove, or on the way home in the car park outside Dolphin Inn. The old car's filler is where your hand goes — yet a rental car, a new car or a company car keeps the fillers somewhere else. That is the second factor: a strange car. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, so nothing stops the tip after it has started. Whether it happens in Monger or the middle of Greenhill, it is the same few seconds. ## Which filler is for AdBlue, and which for diesel? Check these first, on a forecourt around Greenhill or a drive over in Thicket Mead. Seconds, no more. - The cap. The AdBlue cap is regularly blue, or marked "AdBlue". The diesel cap normally is not. Read it rather than going by position. - The size. On many vehicles the AdBlue filler neck is the smaller of the two. - Lift the filler flap and check for a label — many cars mark which goes in which inlet just there. - Can't find it next to your diesel inlet? In that case check below the bonnet or in your boot — the handbook says where. - The person who drove the vehicle last. On a hire or company car picked up from somewhere like the car park outside Oldfield Park, ask before you leave, not when the light comes on. ## How to top up without AdBlue in your diesel tank Wherever across Somerset the light comes on, this is a routine for that day. - Park and switch off. Not on a slope, not with your engine running, and not in a rush on the side of Monger Lane. - Find the AdBlue filler, check the cap, and say the name "AdBlue" out loud as unscrewing it. It sounds silly. It works. - If both sit under one flap, check your diesel cap is still closed before you lift the bottle — and leave it on. - Finish once that tank is topped up or the bottle is empty; until then, tip slowly through its own spout. - Close the cap and check a second time. Make sure your diesel cap was never opened. Only then start your car. Spot at step two or three that it has already gone into the diesel side? So stop just there. Step five stays off limits. ## Greenhill: already put AdBlue in the diesel tank? The short order of things, starting with not starting the motor. Keep the ignition off as well, because on many diesels it alone runs your pump. AdBlue doesn't mix with diesel — it sinks to the bottom of your tank, where your fuel is pulled from — so do not top up with diesel to dilute it. At a forecourt — Tesco, Esso or any other — the staff will normally help roll your car away, if you ask. On your own drive in Greenhill? So the car stays where it is. Already run? Stop once it is sensible, then switch off. Come off the M32 — under 15 miles out of Greenhill — at the first exit. A short hop across Greenhill is a smaller job than a run towards Bath, under 10 miles away, and so tell us roughly how far it went. ## What happens when our technicians arrive in Greenhill Wherever the vehicle came to rest, whether outside Midsomer Norton Primary School, beside Welton Baptist Church or on your own drive, the van travels to it. The replies settle the work and our price, so we ask what got in, about how much, and if it has run. On the call itself, you hear our price — before anything else. Draining your tank comes next, followed by a thorough flush of your system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own — which is why that matters more here than with petrol. Filter flushed or, where it must be, replaced; fresh diesel in; and then a test of the vehicle. Next our technicians start the car and confirm it runs correctly before leaving. With pumps fine on a working forecourt and quiet enough to use outside a house at night, most jobs in which your motor hasn't run take about half an hour after our technicians arrive. Payment is on the day, not upfront, and you are given the documents an insurer wants: an engineer report and a VAT invoice. It's worth looking at your policy as the van travels to you: misfuelling cover is included with many policies. ## About Greenhill Greenhill is a suburban area situated on the riverside in Somerset, with a mix of housing types but predominantly detached homes. Greenhill sits near the city of Bath, approximately 8 miles away, and is close to other nearby places such as Monger and Belle Vue. Greenhill has a population of around 3668 residents and is located at an elevation of 118 metres. Greenhill is also within commuting distance to London, being around 102 miles away. ## AdBlue drains in Greenhill and across Somerset Belle Vue and Hayes Park are among the places around Greenhill, a residential suburb, that the same vans cover, throughout BA postcodes. Our van reaches you fastest with a postcode starting BA3 2. Moving the car is not needed. We drain it where it is — a side street close to The Salvation Army, a lay-by on the way to Welton Rovers Football Club, a driveway. Ring and ask rather than guessing if you're near a border, or somewhere hard to explain, like the back of Midsomer Norton Children's Centre. ## Greenhill drivers: the short version Read the cap before you pour. If AdBlue has gone in the diesel tank regardless, leave it off then ring 0333 366 0103. Petrol in Diesel empties it where it stands, anywhere across Somerset.