--- title: AdBlue in a Diesel Tank Bottrells Close: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/bottrells-close-buckinghamshire/ location: Bottrells Close county: Buckinghamshire latitude: 51.631700 longitude: -0.578250 service: AdBlue in a Diesel Tank updated: 2026-10-19 --- # AdBlue in a Diesel Tank in Bottrells Close: Why It Happens and How to Stop It If AdBlue is already in your diesel tank, stop reading for a moment: leave the engine and your ignition off and call 0333 366 0103. Around Bottrells Close, catching it before the motor turns normally leaves a drain and a thorough flush where it stands. Nothing happened yet? Further down, the page covers the why it occurs and the how to avoid it altogether. ## Two fillers, two tanks: AdBlue in a diesel vehicle Not one liquid but two: that is what plenty of modern diesels around Bottrells Close and Chalfont Grove run, with diesel for the engine. Its own tank holds it, and from there it goes to your exhaust, and there a spray cleans the fumes. Every tank comes with a filler of its own. Some motors put the AdBlue filler in your boot or under the bonnet; plenty more have the two together under one flap. Diesel goes in at every forecourt visit, week in, week out. Much less commonly, the AdBlue side is filled — mostly from a bottle, by a person working out where it goes. That gap is where the mistake lives. ## How AdBlue in your diesel tank takes place around Bottrells Close It is hardly ever carelessness. Three things tend to line up. First, the warning. Low AdBlue brings a message from the vehicle, and letting it run dry leads to limp mode — hence a hurried top-up, perhaps before work off Milton Fields, or at Fox & Hounds on the way home after work. Then the car is unfamiliar. A hire car, a new vehicle or a company car puts the fillers where your last one didn't, and the hand hits for the cap it would have used on the old one. Nothing 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. Whether it occurs in Chalfont St Giles or the middle of Bottrells Close, it's the same few seconds. ## Telling the AdBlue filler from the diesel filler Whether a Bottrells Close forecourt or a drive out in Seer Green, spend a few seconds over these before anything goes in. - Where it sits can mislead; the cap does not. AdBlue caps tend to be blue or bear the name "AdBlue" — diesel caps usually do not. - The size. On plenty of vehicles the AdBlue filler neck is the smaller of the two. - Check inside the fuel flap: many vehicles carry a label there showing which fuel goes where. - Can't see it beside the diesel filler? In that case look beneath the bonnet or inside your boot — the owner's manual says which. - Collecting a hire or company car, say at the car park at Seer Green & Jordans? Check with the person who drove the vehicle last before leaving, not once the light goes on. ## How to top up without AdBlue in your diesel tank On the day the light appears — anywhere you are across Buckinghamshire — a routine to follow. - Pull in somewhere level, engine off, with time to spare — not rushing on the side of Grayburn Close. - Say "AdBlue" out loud as you unscrew the cap, once finding the AdBlue filler and read it. Silly, yes, but it does the trick. - The diesel cap stays on. Where the two share a flap, make sure it's closed before the bottle comes up. - Tip slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Close the cap and check a second time. Make sure your diesel cap was never opened. Only then start the vehicle. Discover at the second or third stage that AdBlue went into the wrong filler? That is where you stop. Step five is out. ## Already put AdBlue in your diesel tank around Bottrells Close? Short order, then. First: the engine remains off. The fuel pump starts on many diesels as soon as the ignition is switched on — so leave it off. Do not top up with diesel to dilute it: AdBlue does not mix with diesel, it sinks to the bottom of your tank, where the fuel is drawn from. On a forecourt — Esso, BP or another — the staff will normally help push the vehicle clear, if you ask. Leave it where it is if you're on your own driveway in Bottrells Close. If your motor has already run, stop as soon as it is safe and switch off. On the M25, under 3 miles from Bottrells Close, that means the next exit. A short hop across Bottrells Close is a smaller job than a run towards St Albans, under 15 miles away, so tell us about how far it went. ## Our arrival in Bottrells Close, and what happens next The van reaches your car anywhere it has come to rest — your own driveway, near Deanway United Church, or outside Chalfont St Giles Infant School and Nursery. What liquid got in, the quantity, and if it ran: we ask since the replies decide both work and quote. That price comes over the phone, ahead of any van leaving. Next: draining, then a thorough flush of the whole system. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. The filter flushed or, if needed, swapped; clean diesel in; then a test of the car. After that we fire it up and check it runs correctly before we go. Unstarted cars usually need a half-hour job after arrival. The kit is safe on a live filling station, and quiet enough for a driveway after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Wrong-fuel cover is included in plenty of insurance policies — so make use of the wait to check yours. ## About Bottrells Close, for a moment Bottrells Close is a locality situated in a riverside setting in Buckinghamshire, with an elevation of 109 metres. Bottrells Close lies near several other small places, including Chalfont St Giles, Stratton Chase, and Jordans, and is within commuting distance of London, being approximately 21 miles from the city. Bottrells Close is characterised by its predominantly detached housing stock, reflecting its suburban nature. Bottrells Close is also close to the city of St Albans, which is 13 miles away. ## AdBlue drains around Bottrells Close and across Buckinghamshire Being a small village, Bottrells Close shares its vans surrounding areas — Stratton Chase, Jordans — all the way across HP postcodes and the surrounding area beyond. Our van gets to you fastest with a postcode starting HP8 4. The car does not need to move. The drain happens on the spot, whether a driveway, a street by The Memorial Hall, or a lay-by on the way to Rushcroft Wood. Awkward to explain, like the back of Milton's Cottage? By a county line? Checking is better than guessing, and so ring. ## The short version for Bottrells Close motorists Read the cap before you tip. Still AdBlue in the diesel tank? Petrol in Diesel can drain it wherever it stands, anywhere across Buckinghamshire: switch the car off then call 0333 366 0103.