--- title: AdBlue in a Diesel Tank South Horrington? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/south-horrington-somerset/ location: South Horrington county: Somerset latitude: 51.213840 longitude: -2.613750 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # How It Happens and How to Prevent It: AdBlue in a Diesel Tank in South Horrington AdBlue already in your diesel tank? In that case put this page down for now, leave your ignition and engine off, and ring 0333 366 0103. In South Horrington, catching it before your engine runs normally means draining and a thorough flush on the spot. If you're reading before it has happened, the remainder of this page is about why it takes place and how to make sure it doesn't. ## Why does AdBlue in a diesel vehicle need its own filler? Diesel feeds the engine — yet many newer diesels driven around South Horrington and Dulcote hold a second fluid as well. AdBlue goes to the exhaust, where it is sprayed into the gas to clean it, and it lives in a tank of its own. There's a filler for every tank. Under one flap, next to each other: that is the arrangement on many vehicles. Elsewhere, AdBlue's filler is under the bonnet or in the boot instead. The diesel side is fuelled at the petrol pump all the time. Rarely topped up, AdBlue usually comes from a bottle, tipped by someone who must stop and think what filler to use. The error lives in that gap. ## AdBlue in the diesel tank around South Horrington: how it takes place It's seldom carelessness. Three things tend to line up. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out completely, the vehicle drops into limp mode. So the top-up is done in a hurry: on a drive off Giles Farm before work, or in the car park at The Britannia Inn on the way home. Then, your hand reaches for the cap it knew on the old car — because a hire car, a new motor or a company car puts the fillers somewhere your last one did not. Nothing halts the pour once it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. The same few seconds decide it, in the middle of South Horrington or out in East Horrington. ## The AdBlue filler and your diesel filler: telling them apart Be it a South Horrington forecourt or a driveway out in St Andrew, spend a few seconds on these before anything goes in. - Where it sits misleads; the cap does not. AdBlue caps tend to be blue or carry the word "AdBlue" — diesel caps usually do not. - On many motors, the size tells: AdBlue gets the smaller filler neck. - A label inside your fuel flap often shows which fuel goes where, on many motors. Look for it. - The handbook. If your filler is not by the diesel cap, it is in your boot or under the bonnet, and the handbook says which. - Check with the person who drove it last — before you leave, not when the light comes on — when you pick up a hire or company car from somewhere like the car park at Castle Cary. ## AdBlue top-ups that never reach your diesel tank Wherever in Somerset the light comes on, this is a routine for the day. - Turn off after you park — level ground, engine stopped, and not in a rush beside School Lane at the roadside. - Silly as it sounds, speaking "AdBlue" out loud while you unscrew the cap does the trick — once you have found your 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. - Gently is best, through the bottle's own spout, till it is full or the bottle is empty. - Shut the cap, and check again — confirm your diesel filler stayed shut throughout. After that, start your car. Find at step two or three that it's already gone into your diesel side? So stop just there. Step five is off limits. ## Already put AdBlue in your diesel tank in South Horrington? Don't start your engine: that is how the short order of things starts. Leave the ignition off as well, because on plenty of diesels it alone starts your fuel pump. Filling up with diesel will not weaken it: rather than mixing, AdBlue sinks to the base of your tank, right where fuel is taken from. If you're at a forecourt, whether it's the BP or the Morrisons, ask the attendants to help push your car away from the petrol pump. On your own drive around South Horrington? Then the car remains put. Stop as soon as it is safe and switch off, if the motor has already run. The next exit is the place to come off when you are on the M5, under 15 miles from South Horrington. Tell us about how far it went: a run towards Wells, under 3 miles away, is a bigger job than a short hop across South Horrington. ## What happens when we arrive in South Horrington The van comes to your car wherever it has come to rest — your own drive, beside Dinder Village Hall, or by Horrington Primary School. Our engineers ask what went in, about how much, and if it's run, since those answers decide this work and our quote. You hear that price on the phone, before anybody heads out. The fuel system is then cleaned thoroughly, after the tank is emptied. Not like petrol, AdBlue forms crystals and eats at some fuel-system metals, and neither clears out unaided. Hence it matters more. Filter cleaned or, if needed, swapped; clean diesel in; then a test of the car. The engine is started next and checked to make sure it runs smoothly, all before our technicians go. Unrun vehicles mostly need a half-hour job from arrival. The kit is safe on a busy forecourt, and quiet enough for a driveway late at night. Payment is on the day, not upfront, and you are given the paperwork your insurer wants: an engineer report and a VAT invoice. Misfuelling cover is included in many insurance policies — and so use the wait to check yours. ## About South Horrington, briefly South Horrington is a small village in Somerset, situated near the city of Wells and surrounded by other nearby villages such as East Horrington and West Horrington. South Horrington sits at an elevation of 86 metres, with terraced housing being the predominant type of accommodation. South Horrington is located inland, approximately 109 miles from London, and has a population of around 753 residents. ## AdBlue drains around South Horrington and across Somerset South Horrington is a rural village, and our vans that cover it also work the places around it, West Horrington and Dinder among them, across the BA postcode area. The van gets to you fastest with a postcode starting BA5 3. The vehicle stays put. Wherever it stands — beside Saint Thomas Church, on a lay-by en route to King's Castle Wood, on a drive — that's where it gets cleared. Awkward to pin down, like the back of St Michael & All Angels? Close to a border? Asking is better than guessing, and so ring. ## For South Horrington people, the short version Pour no AdBlue till you have read the cap. AdBlue in the diesel tank after all? Keep it switched off and phone 0333 366 0103; Petrol in Diesel drains it on the spot, throughout Somerset.