--- title: AdBlue in a Diesel Tank Brize Norton: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/brize-norton-oxfordshire/ location: Brize Norton county: Oxfordshire latitude: 51.766100 longitude: -1.566390 service: AdBlue in a Diesel Tank updated: 2026-10-25 --- # Brize Norton: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? Leave the engine and ignition off and call 0333 366 0103 now — reading can wait when AdBlue is already in your diesel tank. Usually, when your engine has not turned, it's emptied and thoroughly cleaned where the car sits around Brize Norton. If you're reading before it has happened, the remainder of this page is about why it happens and how to make sure it doesn't. ## Two fillers, two tanks: AdBlue in a diesel motor Plenty of newer diesels in Lew, as well as Brize Norton, run on two fluids; your engine takes just the diesel. AdBlue goes to the exhaust, where it is sprayed into the gas to clean it, and it lives in a tank of its own. Each tank has its own filler. Plenty of motors share a single flap for the two, whereas some put the AdBlue filler to your boot or under the bonnet. Diesel gets filled on every filling station call-out, again and again. Much less commonly, the AdBlue side is topped up — normally from a bottle, by someone thinking about where it goes. The slip lives in that gap. ## How does AdBlue in your diesel tank take place around Brize Norton? It's hardly ever carelessness. Three things tend to line up. On a drive off Station Road before work, or in the car park outside The Chequers heading home: that's where the hurried top-up takes place. What is the reason for the rush? As AdBlue gets low the car warns you, and if it is empty, limp mode follows. Then the vehicle is new. A hire car, a new car 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. No part stops the pour after it has started, because a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. Whether it happens in Carterton or the middle of Brize Norton, it's the same few seconds. ## How to tell the AdBlue filler from the diesel one Look at these first, on a forecourt around Brize Norton or a driveway over in Curbridge. Seconds, no more. - Colour and marking: an AdBlue cap is often blue, or says "AdBlue", where a diesel cap normally does not. Go by the cap, not where it sits. - On plenty of motors, the size tells: AdBlue has the smaller filler neck. - The flap. Look inside the fuel flap for a label. Many cars say there which fuel goes where. - Cannot see it beside the diesel inlet? In that case look below the bonnet or inside the boot — the owner's manual will say where. - Picking up a hire or company car, say at the car park at Shipton? Ask whoever drove it last before you set off, not once the light goes on. ## AdBlue top-ups that never reach the diesel tank Anywhere in Oxfordshire the light comes on, here is a routine for the day. - Turn off once parked — flat ground, motor stopped, and never in a rush by Carterton Road on the verge. - Silly as it sounds, saying "AdBlue" aloud while you unscrew the cap does the trick — after you have located the filler and read the cap. - Leave your diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle. - Stop once that tank is topped up or the bottle is empty; before that, pour slowly using the own spout. - Before you start the car, close the cap and check again that the diesel cap never came off. Spot at step two or three that it's already gone into your diesel side? So stop right there. Don't carry on to step five. ## Already put AdBlue in your diesel tank in Brize Norton? Don't start the motor: that's where the short order of things begins. Do not switch the ignition on; on many diesels that alone runs the fuel pump. AdBlue does not mix with diesel — it sinks to the bottom of the tank, where the fuel is pulled from — so don't top up with diesel to thin it. On a forecourt — BP, Asda or any other — the staff will normally help roll the vehicle clear, if you ask. If you are on your own drive around Brize Norton, leave the car where it stands. If the motor has already run, stop as soon as it is safe then switch off. On the M40, under 25 miles from Brize Norton, that means the next exit. Tell us about how far it went: a run towards Oxford, under 15 miles away, is a bigger job than a short hop across Brize Norton. ## What occurs when our technicians turn up in Brize Norton By Brize Norton Primary School, near St Britius or on your own driveway: wherever the vehicle has stopped, we come to it. What liquid was put in, the amount, and if it ran: our technicians ask because those replies set both work and quote. Nobody heads out before you've heard the price by phone. Then that tank is cleared and your system rinsed thoroughly. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own. Your filter is cleaned, or replaced where it needs to be; clean diesel goes in; and the car is tested. The engine is started next and checked to be sure it runs correctly, all before we go. Unstarted vehicles usually mean a half-hour visit after the moment we arrive. The kit is safe on a live filling station, and quiet enough for a driveway after dark. The insurer usually wants an engineer's report and the VAT invoice, and you get both at the end. Payment comes on the day, with no money upfront. Plenty of insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## About Brize Norton Brize Norton is a village in Oxfordshire, situated approximately 13 miles west of Oxford and 64 miles from London, with a population of around 1833 people. Brize Norton sits in a rural area at an elevation of 86 metres, surrounded by nearby places such as Carterton, Bushey Ground, and Worsham. Brize Norton has a range of housing types, with semi-detached homes being particularly prevalent. Brize Norton is located in the South East region of England, within the inland setting of Oxfordshire's countryside. ## Brize Norton and Oxfordshire: AdBlue drains across the area Bushey Ground and Worsham are among the places around Brize Norton, a rural village, that the same vans cover, over OX postcodes. Fastest of all: give a OX18 3 postcode for the van. There's no need to shift the vehicle. Our engineers drain it where it is — a side street near Elderbank Hall, a lay-by on the way to Mary Ellis Country Park - South, a driveway. If you are close to a boundary, or somewhere hard to explain like the back of Brize Norton Sports Pavilion Cricket Nets, ring and ask rather than guessing. ## For Brize Norton drivers, the short version Always, the cap; then, the tip. Petrol in Diesel drains it where it stands, anywhere around Oxfordshire, if AdBlue has gone in the diesel tank anyway — and so leave it off and phone 0333 366 0103.