--- title: AdBlue in a Diesel Tank Corstorphine: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/corstorphine-city-of-edinburgh/ location: Corstorphine county: City of Edinburgh latitude: 55.942540 longitude: -3.281410 service: AdBlue in a Diesel Tank updated: 2026-10-17 --- # AdBlue in a Diesel Tank in Corstorphine: How It Happens and How to Avoid It Leave your engine and ignition off then ring 0333 366 0103 first — reading can wait if AdBlue is already in your diesel tank. Normally, if the engine hasn't turned, it's emptied and thoroughly flushed where your car sits in Corstorphine. Not happened yet? Further down, the rest of the page covers the reasons it takes place and the ways to avoid it altogether. ## Two fillers, two tanks: AdBlue in a diesel motor Not one liquid but two: that's what plenty of newer diesels near Corstorphine and Saughton run, with diesel for the engine. The exhaust, not your engine, is where AdBlue goes: sprayed into the gas to fresh it, from a separate tank. Each tank has its own filler. Other motors keep the AdBlue filler in the boot or under the bonnet; a lot more place the two together under one flap. At the petrol pump, the diesel side is topped up constantly. Rarely filled, AdBlue normally comes out of a bottle, poured by someone who must stop and think which filler it needs. That gap is where the slip lives. ## AdBlue in the diesel tank in Corstorphine: how it occurs Rarely is it carelessness: normally three things coincide. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out altogether, the vehicle goes into limp mode. So the top-up is done in a hurry: on a driveway off St John's Road before work, or in the car park outside Winstons on the way home. The old car's filler is where your hand goes — but a hire car, a new car or a company car puts the fillers elsewhere. That's the second thing: a new motor. Lastly, the spout fits: diesel filler or AdBlue one, it goes in just as readily, and once the tip begins, nothing halts it. It's seconds, be it out in Carrick Knowe or right in the centre of Corstorphine. ## The AdBlue filler and your diesel filler: telling them apart Check these before pouring, on a forecourt in Corstorphine or a driveway out in Clermiston. A few seconds, no more. - Colour and marking: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap normally doesn't. Trust the cap, not where it sits. - The size. On many cars the AdBlue filler neck is the smaller of the two. - Look inside the fuel flap: many motors have a label there showing which fuel goes where. - Can't find it next to your diesel inlet? Then look below the bonnet or inside your boot — the owner's manual says where. - The person who drove the vehicle last. On a hire or company car collected from somewhere like the car park outside South Gyle, ask before you leave, not when the light comes on. ## AdBlue top-ups that never reach your diesel tank For the day the light appears — wherever it is around City of Edinburgh — a routine to follow. - Park then switch off. Not on a slope, not with the motor running, and not in a rush on the side of Clermiston Road. - Daft as it sounds, speaking "AdBlue" aloud while you unscrew the cap does the trick — once you've located the filler and read the cap. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Stop once that tank is topped up or the bottle is empty; until then, tip slowly using the own spout. - Only after that, start the car: close the cap, check again, and make sure your diesel cap was never opened. If at step two or three you find you have already poured into the diesel side, stop there. Don't carry on to step five. ## Corstorphine: already put AdBlue in the diesel tank? Then the order of things is short. Do not start your engine. The fuel pump runs on many diesels as soon as your ignition is switched on — and so leave it off. AdBlue does not mix with diesel — it sinks to the bottom of that tank, where the fuel is sucked from — so don't top up with diesel to thin it. On a forecourt — Tesco, Shell or another — the attendants will normally help push your car away, when you ask. If you're on your own driveway around Corstorphine, leave the car where it sits. Already started? Stop when it's sensible, then switch off. On the M8, under 3 miles from Corstorphine, that means the next exit. Tell us about how far it went: a run towards Edinburgh, under 5 miles away, is a bigger job than a short hop across Corstorphine. ## When our technicians turn up in Corstorphine, what takes place? Our van reaches the car wherever it has come to rest — your own driveway, near Corstorphine Community Centre, or outside the local primary school. Those replies determine the work and our quote, so our technicians ask what got in, about how much, and if it has run. You hear that price on the phone, before anyone sets off. Your system is then flushed thoroughly, once the tank is cleared. Not like petrol, AdBlue leaves crystals and eats at some fuel-system metals, and neither washes away unaided. Hence it counts more. Testing comes at the end: before that, clean diesel is added, and the filter is cleaned or changed if necessary. Before we go, our technicians fire it up and check that it's running correctly. With pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs in which your motor hasn't run take about half an hour after we arrive. No money upfront; you settle up that day. At the end, a VAT invoice and a report from the engineer are handed to you for your insurer. Misfuelling cover is part of many insurance policies — so use the wait to look at yours. ## About Corstorphine Corstorphine is a suburban area in the City of Edinburgh, situated approximately 3.6 miles west of Edinburgh's city centre. Corstorphine lies close to the Firth of Forth, at an elevation of around 53 metres, and is characterised by its predominantly flat housing stock. Corstorphine is bordered by nearby places such as Carrick Knowe, Broomhouse, and The Gyle, and is home to a population of around 6542 residents. ## AdBlue drains across City of Edinburgh, Corstorphine included Corstorphine is a residential suburb, and our teams that cover it also work the towns near it, Broomhouse and The Gyle among them, across the EH postcode area. Quickest of all: quote a EH12 7 postcode to the van. Your car stays where it is. Wherever it stands — near Corstorphine Old Parish Church, on a lay-by heading to St Margaret's Park, on a drive — that's where it is drained. Tricky to explain, like the back of War Memorial? By a county line? Checking is better than assuming, so phone. ## The short version for Corstorphine motorists Tip no AdBlue until you've read the cap. Even so AdBlue in your diesel tank? Petrol in Diesel can drain it wherever it is, anywhere across City of Edinburgh: switch the vehicle off and ring 0333 366 0103.