--- title: AdBlue in a Diesel Tank Irthlingborough: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/irthlingborough-northamptonshire/ location: Irthlingborough county: Northamptonshire latitude: 52.326610 longitude: -0.611700 service: AdBlue in a Diesel Tank updated: 2026-10-10 --- # Preventing AdBlue in a Diesel Tank in Irthlingborough: Why It Happens If AdBlue is already in your diesel tank, stop reading for a moment: leave the motor and your ignition off then ring 0333 366 0103. Caught before your engine runs, it is generally a drain and a thorough flush, done where the vehicle is in Irthlingborough. Here in advance? In that case the rest covers why it happens and what to prevent it happening at all. ## AdBlue in a diesel car, and its separate tank Diesel feeds your motor — but many current diesels seen about Irthlingborough and Finedon carry a second fluid as well. AdBlue goes to your exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. Each tank comes with one filler of its own. Plenty of motors share a single flap for both, whereas others put the AdBlue filler to the boot or under the bonnet. Diesel gets filled on each forecourt call-out, again and again. The AdBlue side is topped up far less regularly, usually from a bottle, and usually by a person who has to stop and think where it goes. The mistake grows in that gap between them. ## How does AdBlue in your diesel tank take place around Irthlingborough? Three things tend to come together, and carelessness is rarely one of them. Haste comes from the warning. The vehicle tells you as AdBlue runs low, and an empty tank puts the vehicle into limp mode — so the top-up gets done quickly, before work on a driveway off Church Street, or on the way home in the car park at The Artlenock Inn. Then your car is strange. A hire car, a new motor or a company car puts the fillers where your last one did not, and your hand gets to for the cap it would have used on the old one. A spouted bottle meets no obstacle at a diesel filler no more than at an AdBlue one. So the tip, after started, carries on. Whether it happens in Higham Ferrers or the middle of Irthlingborough, it is the same few seconds. ## Telling the AdBlue filler from your diesel filler Be it a Irthlingborough forecourt or a drive out in Stanwick, spend a couple of seconds over these before any goes in. - Colour and lettering: an AdBlue cap is often blue, or says "AdBlue", where a diesel cap normally doesn't. Go by the cap, not where it sits. - On plenty of cars, the size gives it away: AdBlue has the smaller filler neck. - The flap. Look inside your fuel flap for a label. Plenty of cars say there which fuel goes where. - The handbook shows where it lives when the filler isn't next to your diesel cap: your boot, or under the bonnet. - The previous driver knows. Check as you pick up a hire car or company car — from Wellingborough's car park, perhaps — rather than when the light comes on. ## Topping up AdBlue without it reaching your diesel tank Wherever across Northamptonshire the light comes on, here is a routine for that day. - Not in a rush on the side of Finedon Road, not on a slope, not with your engine running: park then switch off first. - Silly as it sounds, speaking "AdBlue" out loud as you unscrew the cap does the trick — after you've found your filler and read it. - The two behind one flap? So confirm the cap on your diesel side is still shut before lifting the bottle. - Finish once your tank fills or the bottle is empty; until then, pour gently through the built-in spout. - Before starting the car, close the cap and look again that your diesel cap was never opened off. Find at step two or three that it has already gone into the diesel side? So stop right there. Leave out step five altogether. ## AdBlue in the diesel tank already, in Irthlingborough? What follows is a short order of things, starting with no starting the motor. The fuel pump starts on plenty of diesels the moment the ignition is switched on — so keep it off. AdBlue doesn't mix with diesel — it sinks to the bottom of the tank, where the fuel is pulled from — so do not top up with diesel to dilute it. If you are at a forecourt, whether it is the Shell or the Asda, ask the staff to help roll your car clear of the pump. Your own drive around Irthlingborough is where it should stay. Stop as soon as it is safe then switch off, if your engine has already run. Leave the A1(M) — under 25 miles out of Irthlingborough — at the next exit. Tell us roughly how far it went: a run towards Milton Keynes, under 25 miles away, is a bigger job than a short hop across Irthlingborough. ## Our arrival in Irthlingborough, and what happens next Wherever the vehicle came to rest, be it by Irthlingborough Junior School, near St. Peter's Church or at home, our van comes to it. Both the work and the price depend on three replies — what fluid, what quantity, and whether it's run — so our technicians ask. You get that quote by phone, before anyone sets off. After that: draining, then a full flush of the entire system. More than with petrol, it matters here: crystals form, some metals corrode, and none of that clears away on its own, no matter how long it is left. A test comes last: before that, fresh diesel goes in, and your filter is flushed or replaced if necessary. Before we leave, our engineers start the engine and check that it is running smoothly. Unrun vehicles mostly need a half-hour visit after the moment we arrive. The equipment is fine on a live filling station, and hushed enough for a residential street after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Before we get there, have a look at your insurance documents; many include cover for misfuelling. ## About Irthlingborough itself Irthlingborough is a town in Northamptonshire, situated on the lakeside at an elevation of 61 metres, with semi-detached housing being the predominant type of accommodation. Irthlingborough lies approximately 20.5 miles from Milton Keynes and 60.2 miles from London, making it a commuter town with good connections to major cities. Irthlingborough is surrounded by nearby places such as Higham Ferrers, Warmonds Hill, and Little Addington, and has a population of around 8406 residents. Irthlingborough's lakeside setting provides a unique environment for the town's residents and visitors. ## Irthlingborough and Northamptonshire: AdBlue drains across the area Over NN postcodes, the teams that cover Irthlingborough — a town — work the nearby places too, Little Addington and Warmonds Hill included. Quickest of all: give a NN9 5 postcode to the van. The vehicle remains where it is. Anywhere it sits — beside College Street Centre, in a lay-by en route to Les O'Dell Park, on a drive — that's where it gets cleared. Ring and ask rather than assuming if you're near a border, or somewhere hard to describe, like the back of Irthlingborough Salvation Army. ## Irthlingborough drivers: the short version First, the cap; after that, the pour. If AdBlue has gone in the diesel tank anyway, leave the car off then call 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere across Northamptonshire.