--- title: Explained: AdBlue in a Diesel Tank Colton Hills canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/colton-hills-staffordshire/ location: Colton Hills county: Staffordshire latitude: 52.557250 longitude: -2.141560 service: AdBlue in a Diesel Tank updated: 2026-10-25 --- # AdBlue in a Diesel Tank in Colton Hills: Why It Occurs and How to Stop It Stop reading a minute if the diesel tank already holds AdBlue in it: ignition off, motor off, then phone 0333 366 0103. In Colton Hills, catching it before the motor turns usually leaves draining and a thorough flush where it stands. Reading before the event? Then the rest explains how it happens and how to prevent it ever happening. ## Two fillers, two tanks: AdBlue in a diesel vehicle Plenty of modern diesels on the roads round Colton Hills and Penn carry two liquids, not one. Diesel goes to your engine. AdBlue goes to the exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. Every tank has one filler of its own. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. Diesel gets filled at each forecourt visit, week in, week out. Someone who has to stop and think where it goes normally tops up the AdBlue side, from a bottle, and much less often. The slip lives in that gap. ## AdBlue in the diesel tank in Colton Hills: how it happens Carelessness rarely explains it. What does is three things coming up at once. Haste follows from the warning. The vehicle warns you as AdBlue runs low, and an empty tank sends it into limp mode — so the top-up happens quickly, before work on a driveway off Dewsbury Drive, or on the way home in the car park at Barley Mow. The old car's filler is where the hand goes — yet a rental car, a new motor or a company car puts the fillers somewhere else. That is the second factor: an unfamiliar car. Nothing stops the pour after 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 Colton Hills or out in Greenleighs. ## The AdBlue filler and your diesel filler: telling them apart Be it a Colton Hills forecourt or a driveway over in Penn Fields, take a couple of seconds on these before anything goes in. - The cap. The AdBlue cap is often blue, or marked "AdBlue". Your diesel cap usually is not. Read it rather than going by where it sits. - The size. On many motors the AdBlue filler neck is the smaller of the two. - Lift the flap and look for a label — plenty of motors mark what goes in each filler just there. - In your boot or under the bonnet: that is where the filler is if it is not by the diesel cap, and the handbook says which. - Picking up a hire or company car, perhaps at the car park at Wolverhampton? Ask whoever drove it last before leaving, rather than once the light goes on. ## Keeping AdBlue out of the diesel tank when you top up For the day the light appears — wherever you are around Staffordshire — a routine to follow. - Switch off after you park — level ground, engine off, and not in a rush by Saffron Gardens on the verge. - Silly as it sounds, saying "AdBlue" aloud while you unscrew the cap works — after you've found the filler and read it. - If both sit under one flap, check your diesel cap is still closed before you lift the bottle — then leave the car on. - Stop when that tank is topped up or the bottle runs dry; before that, tip gently using its built-in spout. - Before starting the vehicle, close the cap and check a second time that your diesel cap was never opened off. Find at the second or third step that the bottle went in the diesel filler? That is where you stop. Never go on to step five. ## Put AdBlue in your diesel tank around Colton Hills already? Brief list, then. Top of that: your motor stays off. Don't switch your ignition on; on plenty of diesels that alone runs the fuel pump. AdBlue does not mix with diesel — it sinks to the bottom of that tank, where your fuel is pulled from — so do not top up with diesel to dilute it. Ask the attendants to help roll your car clear of the petrol pump if you are at a forecourt — the BP, the Texaco or somewhere else. Leave it where it is if you're on your own driveway around Colton Hills. Stop as soon as it is safe then switch off, if the motor has already run. The next exit means where to leave if you are on the M6, under 10 miles from Colton Hills. A short hop across Colton Hills is a smaller job than a run towards Wolverhampton, under 3 miles away, so tell us about how far it went. ## Our arrival in Colton Hills, and what occurs next Outside St Bartholomew's Church of England Primary School, close to St Aidan or on your own drive: wherever the car has stopped, we come to it. Both the work and the price depend on three replies — which liquid, what amount, and if it's run — so our engineers ask. The price is given on the call, before any van leaves. Next: a drain, then a full flush of the whole system. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it does not wash out on its own. After the fuel filter has been cleaned — or replaced, if required — clean diesel goes in, and finally the vehicle is tested. Your engine is started next and checked to make sure it runs smoothly, all before our technicians head off. If your engine hasn't run, most jobs take about half an hour once we're there, using pumps that are safe on a working forecourt and quiet enough to use outside a house at night. Paying happens on the day, not upfront, and you receive the paperwork your insurer wants: an engineer's report and a VAT invoice. Before we get there, take a look at your policy; many carry cover for misfuelling. ## About Colton Hills Colton Hills is a locality situated on the outskirts of Wolverhampton, near the riverside and surrounded by other residential areas such as Greenleighs and Goldthorn Park. Colton Hills sits at an elevation of 174 metres, with detached housing being the predominant type of accommodation in the area. Colton Hills is located approximately 2.1 miles from Wolverhampton city centre, making it a convenient residential location. Colton Hills has a population of around 1315 people, according to approximate estimates. ## AdBlue drains around Colton Hills, and Staffordshire beyond Goldthorn Park and Goldthorn Hill are among the towns near Colton Hills, a neighbourhood, that the same teams cover, over WV postcodes. Fastest of all: quote a WV4 5 postcode for our van. There's no need to shift your car. A driveway, a lay-by on the way to Park Coppice, a side street near Penn United Reformed Church: our technicians drain it where it stands. Ring and ask rather than guessing if you are close to a boundary, or somewhere hard to describe, like the back of St Bartholomew's. ## In short, for Colton Hills drivers Tip no AdBlue until you've read the cap. If AdBlue has gone in your diesel tank anyway, leave it off then ring 0333 366 0103. Petrol in Diesel empties it where it stands, anywhere in Staffordshire.