--- title: AdBlue in a Diesel Tank Throop? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/throop-dorset/ location: Throop county: Dorset latitude: 50.762590 longitude: -1.849030 service: AdBlue in a Diesel Tank updated: 2026-10-18 --- # How It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Throop Pause here a minute when your diesel tank already holds AdBlue in it: ignition off, engine off, and phone 0333 366 0103. Usually, if the motor hasn't run, it is emptied and thoroughly cleaned where the car sits in Throop. The remainder of this page covers why it happens and how to make sure it does not — handy if you're reading ahead of time. ## Why does AdBlue in a diesel vehicle need its own filler? Plenty of newer diesels on the roads about Throop and Merritown carry two liquids, not one. Diesel goes to the engine. The exhaust, not your motor, is where AdBlue goes: dosed into the gas to fresh it, from a separate tank. Separate tanks, different fillers. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. The diesel side is filled at the pump all the time. Seldom topped up, AdBlue normally goes in from a bottle, tipped by a driver who has to stop and think what filler it needs. That gap is where the error lives. ## AdBlue in your diesel tank in Throop: how it occurs Carelessness seldom causes it. Instead is three things lining up together. 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 drive off Muscliffe Lane, or heading home in the car park at The Broadway. Unfamiliar vehicles are next, as well. Hire cars, new cars and company cars place their fillers in new places, and habit goes for the cap used on the old one. Lastly, the spout fits: diesel filler or AdBlue filler, it slides in just as easily, and after the tip begins, no part stops it. It takes seconds, be it out in Mill Throop or right in the centre of Throop. ## Which filler is for AdBlue, and which for diesel? Look at these before pouring, on a forecourt around Throop or a drive out in West Hurn. A few seconds, that's all. - The cap. The AdBlue cap is commonly blue, or marked "AdBlue". The diesel cap usually isn't. Read it rather than going by where it sits. - Plenty of vehicles give AdBlue the smaller filler of the two. - A label inside the fuel flap often shows which fuel goes where, on plenty of cars. Check for it. - The handbook. If your filler is not by your diesel cap, it is in your boot or under the bonnet, and the handbook says which. - Ask the person who drove it last — before you leave, not when the light comes on — if you pick up a hire or company car from somewhere like the car park at Pokesdown. ## Topping up AdBlue without it reaching your diesel tank When the light goes on, wherever around Dorset, follow this routine. - Not in a rush on the side of Willow Mead, not on a slope, not with the engine running: park then switch off properly. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds silly and it does the trick. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty. - Only then, start the vehicle: close the cap, check again, and make sure the diesel cap was never opened. Stop there if you find, at step two or three, that you've already poured into your diesel side. Don't go on to stage five. ## Already put AdBlue in the diesel tank in Throop? Then the order of things is short. Don't start the motor. Don't switch the ignition on; on plenty of diesels that alone runs the fuel pump. Do not top up with diesel to thin it: AdBlue does not mix with diesel, it sinks to the bottom of that tank, where the fuel is pulled from. The attendants at Asda Express, Esso or any forecourt will usually lend a hand pushing your car away when you ask. If you're on your own drive around Throop, leave it where it is. If the motor has already run, stop as soon as it is safe then switch off. The next exit means the place to leave if you're on the M27, under 25 miles from Throop. Distance counts — a quick hop across Throop makes a smaller job than driving under 25 miles to Salisbury — so tell us about how far it went. ## Our arrival in Throop, and what takes place next Wherever the car came to rest, be it by Muscliff Primary School, beside Brethren's Meeting Room or at home, our van comes to it. The answers determine the work and the price, and so we ask what was put in, about how much, and whether it has run. That quote comes over the phone, before any van leaves. Your system is then flushed thoroughly, once the tank is emptied. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. The filter cleaned or, where needed, replaced; fresh diesel in; and then a check of the vehicle. We don't leave until it has been fired up and is running properly. Most jobs are finished in about half an hour after our technicians get there, as long as your engine hasn't run — and the pumps our technicians use are fine on a busy forecourt and quiet after dark outside a house. Paying happens on the day, not upfront, and you receive the documents your insurer wants: an engineer's report and a VAT invoice. It is worth looking at your insurance as the van travels to you: misfuelling cover comes with many policies. ## About Throop itself Throop is a coastal suburban area in Dorset, situated near the cities of Bournemouth and Poole, and approximately 21 miles from Salisbury. Throop has a relatively low elevation of 18 metres above sea level, and its population is around 2471 residents. Throop is characterized by its predominance of terraced housing, which is typical of many suburban areas in the region. Throop is also close to nearby places such as Mill Throop, Muscliffe, and Muscliff. ## AdBlue drains around Throop, and Dorset beyond Throop is a residential suburb, and our vans that cover it also work the places around it, Muscliffe and Muscliff among them, across the BH postcode area. The van gets to you fastest with a postcode starting BH9 3. There's no need to shift your car. Wherever it sits — beside Saint Paul's, Throop, on a lay-by heading to Rio-Mar Home Park, on a drive — that's where it is cleared. Tricky to pin down, like the back of Marks & Spencer? Close to a border? Checking beats guessing, and so phone. ## For Throop drivers, the short version Read the cap before you tip. Petrol in Diesel empties it where it stands, anywhere across Dorset, if AdBlue has gone in the diesel tank regardless — so leave it off and call 0333 366 0103.