--- title: AdBlue in a Diesel Tank Newtown: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/newtown-hampshire-po11-0/ location: Newtown county: Hampshire latitude: 50.794370 longitude: -0.989220 service: AdBlue in a Diesel Tank updated: 2026-10-19 --- # Newtown: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? If AdBlue is already in your diesel tank, stop reading for a moment: leave your engine and the ignition off then ring 0333 366 0103. Around Newtown, catching it before your motor runs normally leaves a drain and a full flush where it stands. Reading in advance? In that case what follows explains how it happens and how to prevent it ever happening. ## AdBlue in a diesel vehicle, and its separate tank Many modern diesels on the roads about Newtown and South Hayling carry two liquids, not one. Diesel goes to your motor. Kept in a tank of its own, AdBlue is fed into your exhaust gas to clean it. Each tank has its own filler. Some cars keep the AdBlue filler in your boot or under the bonnet; a lot of others have the two side by side behind one flap. Topping up your diesel side at the petrol pump happens constantly. The AdBlue side is filled far less often, usually from a bottle, and usually by someone who has to stop and think where it goes. Mistakes happen in that gap between them. ## Newtown: how AdBlue in the diesel tank takes place It's seldom carelessness. Three things tend to line up. On a driveway off Charleston Close before work, or in the car park at The Newtown House Hotel on the way home: that is where the rushed top-up takes place. Why the rush? As AdBlue gets low the vehicle warns you, and once it's empty, limp mode follows. Unfamiliar cars are second, as well. Hire cars, new cars and company motors put their fillers differently, and habit goes for the cap used on the old one. No part stops the tip once it has started, since a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. The same few seconds settle it, in the middle of Newtown or out in West Town. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a driveway in Sea View or a forecourt around Newtown, check these. They take a few seconds. - Where it sits can mislead; the cap does not. AdBlue caps are often blue or carry the word "AdBlue" — diesel caps normally don't. - Check the size: the smaller filler neck is, on many cars, the AdBlue one. - Check inside the fuel flap: many vehicles carry a label there saying which fuel goes where. - In the boot or under the bonnet: that's where the filler sits if it is not by the diesel cap, and the handbook tells you which. - The previous driver knows. Check when you collect a rental or fleet car — from Fratton's car park, say — rather than when the light comes on. ## How to top up without AdBlue in your diesel tank Wherever in Hampshire the light comes on, this is a routine for that day. - Stop on level, motor off, with time in hand — never hurried on the side of Dances Way. - Say "AdBlue" out loud as you unscrew the cap, after you find the AdBlue filler and reading it. Daft, perhaps, yet it does the trick. - The diesel cap stays on. Where both share a flap, confirm it's shut before the bottle comes up. - Using the bottle's own spout, tip slowly — and stop when it's full or the bottle is empty. - Before you start the car, shut the cap and check a second time that your diesel cap was never opened off. If at step two or three you find you have already poured into the diesel side, stop there. Never go on to step five. ## Put AdBlue in the diesel tank in Newtown already? What follows is a short order of things, beginning with not starting your engine. The fuel pump runs on plenty of diesels the moment your ignition goes on — so leave it off. AdBlue doesn't mix with diesel — it sinks to the bottom of that tank, where the fuel is pulled from — so do not top up with diesel to dilute it. On a forecourt — JET, Esso or another — the attendants will usually help push your car away, if you ask. At home around Newtown? So the car remains where it is. When the motor has been run by now, stop somewhere safe then turn it off. The next junction is where to leave when you're on the Waterlooville Bypass, under 5 miles from Newtown. Distance counts — a short hop across Newtown is a smaller job than driving under 5 miles to Portsmouth — so tell us roughly how far it went. ## Our arrival in Newtown, and what occurs next Our technicians come to the vehicle wherever it has stopped, whether that is outside Mengham Infant School, near Station Theatre or on your own driveway. Our technicians ask what went in, roughly how much, and if it has run, since those answers decide this work and the quote. On the phone call itself, you hear the price — ahead of dispatch. Draining that tank comes next, then a full flush of the fuel system. Not like petrol, AdBlue forms crystals and eats at some fuel-system metals, and neither washes away by itself. Hence it counts more. After the filter has been cleaned — or replaced, where required — clean diesel is added, and then your vehicle is tested. We do not go until it has been fired up and is running correctly. Unstarted cars usually mean a half-hour visit after the moment we arrive. The equipment is fine on a live forecourt, and hushed enough for a residential street after dark. The insurer usually wants an engineer's report and your VAT invoice, and you get both at the end. Payment is on the day, with no money upfront. Wrong-fuel cover is included in many insurance policies — and so make use of the wait to look at yours. ## About Newtown and where it is Newtown is a coastal suburban area in Hampshire, situated near the city of Portsmouth and close to several nearby places including West Town and Gable Head. Newtown sits at a low elevation of around 5 metres, reflecting its proximity to the sea. Newtown has a population of approximately 3161 residents, who mostly live in detached housing. ## AdBlue drains across Hampshire, Newtown included Gable Head and Westfield are among the towns around Newtown, a new town, that the same teams cover, over PO postcodes. Fastest of all: give a PO11 0 postcode for the van. The vehicle doesn't need to shift. Our technicians drain it where it is — a side street close to The Bridge Church, a lay-by on the way to Legion Field, a driveway. Awkward to pin down, like the back of Hayling Island War Memorial? By a border? Asking is better than assuming, and so ring. ## In short, for Newtown people Tip no AdBlue till you've read the cap. Still AdBlue in your diesel tank? Petrol in Diesel will empty it where it is, anywhere in Hampshire: keep it off then ring 0333 366 0103.