--- title: AdBlue in a Diesel Tank Pidney: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/pidney-dorset/ location: Pidney county: Dorset latitude: 50.879050 longitude: -2.363230 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # Pidney: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? AdBlue already in the diesel tank? In that case put this page aside a moment, leave the ignition and engine off, and call 0333 366 0103. Around Pidney, catching it before the motor runs usually leaves a drain and a full flush on the spot. The remainder of this page covers why it happens and how to ensure it does not — handy if you're reading ahead of time. ## AdBlue in a diesel motor: two tanks, two fillers Plenty of modern diesels on the roads around Pidney and Kingston carry two liquids, not one. Diesel goes to the motor. AdBlue goes to your exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. Separate tanks, different fillers. On a lot of vehicles 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 topped up at the pump all the time. Someone who has to stop and think where it goes normally fills the AdBlue side, from a bottle, and far less frequently. That gap is where the mistake lives. ## How AdBlue in the diesel tank occurs around Pidney Seldom is it carelessness: usually three things line up. On a drive off The Causeway before work, or in the car park at The Antelope Inn on the way home: that's where the rushed top-up takes place. What is the reason for the rush? As AdBlue runs low the car warns you, and once it's empty, limp mode kicks in. The old car's cap is where the hand goes — yet a rental car, a new motor or a company car puts the fillers somewhere else. That's the second thing: an unfamiliar vehicle. A spouted bottle meets no resistance at a diesel filler no more than at an AdBlue one. And so the pour, after started, carries on. Whether it occurs in Hazelbury Bryan or the middle of Pidney, it's the same few seconds. ## Telling the AdBlue filler from the diesel filler Before you tip anything, whether on a driveway in Droop or a forecourt in Pidney, check these. They take a couple of seconds. - Where it sits misleads; the cap does not. AdBlue caps are often blue or bear the name "AdBlue" — diesel ones normally don't. - Check the size: the smaller neck is, on plenty of vehicles, the AdBlue one. - The flap. Look inside the fuel flap for a label. Plenty of motors say there which fuel goes where. - The handbook. If the filler isn't by the diesel cap, it's in your boot or under the bonnet, and the handbook says which. - The person who drove it last. On a hire or company car picked up from somewhere like the car park at Sherborne, ask before you leave, not when the light comes on. ## Keeping AdBlue out of your diesel tank when you top up Anywhere across Dorset the light comes on, here is a routine for that day. - Park then switch off. Not on a slope, not with your engine running, and not in a rush on the side of Water Knap. - Locate the AdBlue filler, check the cap, and say the word "AdBlue" aloud as you unscrew it. It seems silly. It does the trick. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — and leave the car on. - Slowly does it, through the bottle's own spout, until it is full or the bottle is empty. - Shut the cap, and look once more — confirm your diesel filler stayed closed throughout. After that, start your car. Find during the second or third step that AdBlue went into the diesel tank? That's where you stop. Step five is off limits. ## Put AdBlue in your diesel tank around Pidney already? Then the order of things is short. Do not start the motor. Keep the ignition off too, because on many diesels it by itself runs your pump. AdBlue does not mix with diesel — it sinks to the bottom of your tank, where the fuel is pulled from — so don't top up with diesel to thin it. If you are on a forecourt, whether it's the Gulf or the Murco, ask the attendants to help push the car away from the petrol pump. Your own drive around Pidney is where it should stay. Stop as soon as it is safe then switch off, if your motor has already run. Leave the M5 — under 50 miles out of Pidney — at the next junction. Roughly how far did it go? Crossing Pidney is less a job than a run of under 50 miles towards Wells, and so tell us. ## Pidney: what takes place when our engineers get there Wherever your car has stopped, whether by Hazelbury Bryan Primary School, beside St Mary & St James or at home, the van travels to it. Both the work and our quote depend on three replies — what liquid, what amount, and if it has run — so our technicians ask. Nobody heads out until you've heard the quote by phone. Next: draining, then a full flush of the entire system. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own. After the filter is flushed — or renewed, if needed — fresh diesel goes in, and then the car gets tested. Before we leave, we fire it up and make sure that it is running correctly. With pumps safe on a busy forecourt and quiet enough for use outside a house at night, most jobs where the engine hasn't run need roughly half an hour once we are there. Nothing in advance; you settle up that day. At the end, a VAT invoice and the report from the engineer go to you for the insurer. While we travel, take a look at your policy; plenty include cover for misfuelling. ## About Pidney, briefly Pidney is a suburban area in Dorset, situated inland at an elevation of 87 metres, with a mix of detached housing and local amenities. Pidney lies near the villages of Hazelbury Bryan and Pleck, and is within commuting distance of the city of Wells. Pidney is also close to the village of Wonston, and is part of the wider rural landscape of south-west England. Pidney has a population of around 1074 residents, living in predominantly detached homes. ## AdBlue drains around Pidney, and Dorset beyond Pidney is a residential suburb, and the teams that cover it also work the towns around it, Pleck and Wonston among them, across the DT postcode area. The van reaches you fastest with a postcode starting DT10 2. Moving the vehicle isn't necessary. Anywhere it stands — near Mappowder Village Hall, on a layby heading to Alners Gorse, on a drive — that's where it gets emptied. Tricky to explain, like the back of King's Stag Memorial Chapel? Close to a border? Asking beats assuming, so phone. ## For Pidney people, the short version Read the cap before you pour. AdBlue in the diesel tank regardless? Keep the car switched off then ring 0333 366 0103; Petrol in Diesel drains it on the spot, throughout Dorset.