--- title: Rugby: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/rugby-warwickshire/ location: Rugby county: Warwickshire latitude: 52.372180 longitude: -1.262650 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # Preventing AdBlue in a Diesel Tank in Rugby: Why It Occurs AdBlue already in the diesel tank? In that case set this page down a moment, keep the ignition and motor off, then phone 0333 366 0103. Normally, if your engine hasn't turned, it's emptied and thoroughly purged where your vehicle sits around Rugby. The rest of this page explains why it takes place and how to ensure it does not — handy if you're reading before it has happened. ## Two fillers, two tanks: AdBlue in a diesel car Many newer diesels on the roads around Rugby and Bilton carry two liquids, not one. Diesel goes to the motor. AdBlue's own tank holds it, and from there it goes to the exhaust, and there spraying treats the gas. Each tank has its own filler. Some motors put the AdBlue filler in your boot or under the bonnet; a lot more place both together behind one flap. At the petrol pump, your diesel side is topped up constantly. Someone who has to stop and think where it goes usually tops up the AdBlue side, from a bottle, and much less often. It is in the gap that the slip happens. ## How AdBlue in the diesel tank takes place in Rugby Carelessness rarely causes it. What does is three things lining up at once. Haste follows from the warning. The vehicle tells you as AdBlue runs low, and a dry tank sends the vehicle into limp mode — so the top-up happens quickly, before work on a driveway off Market Place, or heading home in the car park at The Black Swan. The old car's cap is where the hand goes — but a hire car, a new vehicle or a company car keeps the fillers somewhere else. That is the second thing: 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 takes place in New Bilton or the middle of Rugby, it is the same few seconds. ## Telling the AdBlue filler from the diesel filler Be it a Rugby forecourt or a driveway out in Brownsover, take a few seconds over these before anything is poured in. - Where it sits can mislead; the cap doesn't. AdBlue ones tend to be blue or bear the word "AdBlue" — diesel ones usually do not. - The size. On plenty of motors the AdBlue filler neck is the smaller of the two. - Check inside your fuel flap: many vehicles carry a label there saying which fuel goes where. - The handbook says which it lives if the filler isn't next to the diesel cap: the boot, or under the bonnet. - Collecting a hire or company car, perhaps at the car park at the nearest station? Check with the person who drove it last before leaving, not when the light comes on. ## Topping up AdBlue without it reaching the diesel tank On the day the warning appears — wherever you are around Warwickshire — a routine to follow. - Turn off once parked — flat ground, engine off, and never rushed by High Street at the roadside. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it does the trick. - Both under one flap? Then confirm the cap on the diesel filler is still shut before raising the bottle. - Pour slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Before you start the car, shut the cap and look a second time that the diesel cap was never came off. Discover at the second or third stage that the bottle went in the wrong tank? That is where you stop. Leave out step five altogether. ## Put AdBlue in your diesel tank in Rugby already? Short order, then. First: the motor remains off. The fuel pump starts on many diesels the moment the ignition is switched on — and so keep it off. Do not top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of that tank, where your fuel is pulled from. At a forecourt — Asda, Texaco or another — the staff will usually help push your car clear, when you ask. On your own drive in Rugby? Then your car stays where it is. If your motor has already run, stop as soon as it is safe and switch off. Rugby lies under 3 miles from the M45; there, take the next exit. Distance counts — a short hop across Rugby makes a smaller job than driving under 15 miles towards Coventry — so tell us about how far it went. ## What takes place when our technicians arrive around Rugby Our van reaches your car anywhere it stopped — your own drive, beside Rugby’s Got Balls, or by Northlands Primary School. Which liquid was put in, the amount, and if it ran: our technicians ask because those answers set the work and quote. That quote is given over the phone, ahead of any van leaving. Next: a drain, then a full flush of the entire system. More than with petrol, it counts here: crystals build up, some metals corrode, and none of it washes out unaided, however long it sits. Your filter is flushed, or replaced where it needs to be; clean diesel goes in; and the vehicle is tested. The engine is fired up next and checked to be sure it runs smoothly, all before we leave. Unrun cars mostly need a half-hour job after the moment we arrive. The equipment is safe on a live forecourt, and quiet enough for a residential street after dark. Paying happens on the day, not upfront, and you are given the documents an insurer wants: an engineer's report and a VAT invoice. Plenty of insurance policies include misfuelling cover, so it is worth checking yours whilst we're on the way. ## About Rugby itself Rugby is a town situated in the eastern part of Warwickshire, England, and is located near a major river. It serves as the primary settlement in the surrounding borough, which encompasses a larger area. The town is known for its market heritage and is a significant urban centre in the region. Rugby is set inland, away from the coast. ## AdBlue drains in Rugby and across Warwickshire Rugby is a town, and the vans that cover it also work the towns around it, Overslade and Newbold on Avon among them, across the CV postcode area. Quickest of all: quote a CV21 3 postcode for our van. Moving the car isn't needed. A drive, a lay-by on the way to Jubilee Gardens, a side street close to David Campese - Australia: our engineers drain the car where it sits. Guessing won't help behind St Andrew, on a border, or somewhere hard to pin down; phone and ask. ## In short, for Rugby motorists Read the cap before you tip. AdBlue in the diesel tank regardless? Leave it off then phone 0333 366 0103; Petrol in Diesel drains it on the spot, throughout Warwickshire.