--- title: Craigmillar: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/craigmillar-city-of-edinburgh/ location: Craigmillar county: City of Edinburgh latitude: 55.930110 longitude: -3.139690 service: AdBlue in a Diesel Tank updated: 2026-10-20 --- # How It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Craigmillar AdBlue already in the diesel tank? In that case set this page down for now, keep the ignition and motor off, and call 0333 366 0103. Normally, when the motor has not turned, it's emptied and fully flushed where your car is in Craigmillar. Nothing happened yet? Further down, the rest of the page explains the why it takes place and the ways to avoid it for good. ## Why does AdBlue in a diesel vehicle need its own filler? No single fluid but two: that's how plenty of newer diesels near Craigmillar and Nether Liberton run, with diesel for the engine. Its own tank keeps it, and from there it goes to the exhaust, and there spraying treats the gas. Each tank has its own filler. Plenty of cars share a single flap for both, while some put the AdBlue filler to your boot or under the bonnet. Diesel gets filled on every filling station visit, week in, week out. A driver who has to stop and think where it goes normally fills the AdBlue side, from a bottle, and much less frequently. The slip lives in that gap. ## AdBlue in the diesel tank around Craigmillar: how it takes place Three things tend to come together, and carelessness is rarely one of them. Haste comes from the warning. The vehicle tells you as AdBlue runs low, and a dry tank puts the vehicle into limp mode — so the top-up gets done quickly, before work on a driveway off Castlebrae Avenue, or heading home in the car park at Oman's. The old car's filler is where your hand goes — yet a hire car, a new vehicle or a company car keeps the fillers somewhere else. That is a second thing: an unfamiliar vehicle. Third, the spout fits: a diesel filler or AdBlue filler, it slides in just as easily, and once the pour starts, nothing stops it. Whether it occurs in Niddrie or the middle of Craigmillar, it's the same few seconds. ## Which filler is for AdBlue, and which for diesel? Look at these before pouring, on a forecourt around Craigmillar or a drive out in Moredun. A few seconds, no more. - Colour and lettering: an AdBlue cap is frequently blue, or says "AdBlue", where a diesel cap normally doesn't. Trust the cap, not where it sits. - Many motors fit AdBlue the smaller neck of the two. - Lift the filler flap and check for a label — plenty of vehicles show what goes in each inlet right there. - Cannot find it beside your diesel inlet? Then look below the bonnet or inside the boot — the owner's manual will say which. - Ask the person who drove it last — before you leave, not when the light comes on — if you collect a hire or company car from somewhere like the car park at Brunstane. ## AdBlue top-ups that never reach your diesel tank On the day the light comes on — anywhere it is across City of Edinburgh — a routine to follow. - Not in a rush on the side of Craigmillar Castle Avenue, not on a slope, not with the motor running: park and switch off first. - Find the AdBlue filler, check the cap, and speak the word "AdBlue" out loud while unscrewing it. It seems silly. It does the trick. - The diesel cap stays on. When the two share a flap, make sure it is closed before lifting the bottle. - Stop when that tank fills or the bottle runs dry; before that, pour gently through its own spout. - Close the cap and check a second time. Make sure your diesel cap was never opened. Only then start the car. If at step two or three you find you have already poured into the diesel side, stop there. Don't go on to step five. ## Craigmillar: already put AdBlue in the diesel tank? Brief order, then. First: the motor stays unstarted. Do not switch the ignition on; on many diesels that alone runs the fuel pump. Don't top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of that tank, where your fuel is pulled from. At a forecourt — Wm Turnbull, Sainsbury's or another — the attendants will normally help roll your car clear, when you ask. If you're on your own drive around Craigmillar, leave the vehicle where it stands. Stop as soon as it is safe then switch off, if your engine has already run. Craigmillar lies under 10 miles from the M8; there, use the next exit. Distance matters — a quick hop across Craigmillar makes a smaller job than heading under 3 miles to Edinburgh — so say roughly how far it went. ## Our arrival in Craigmillar, and what happens next By the local primary school, close to The Redeemed Christian Church of God or on your own driveway: wherever the car has stopped, our engineers come to it. Our technicians ask what went in, roughly how much, and whether it has run, because the answers decide the work and our price. Nobody heads out before you have heard our price over the phone. Emptying your tank comes next, followed by a full flush of the system. Not like petrol, AdBlue leaves crystals and attacks some fuel-system metals, and neither clears out by itself. Hence it counts more. Once the fuel filter has been flushed — or renewed, where needed — fresh diesel goes in, and finally your car gets tested. Next we start the engine and check it runs smoothly before leaving. Unrun cars usually mean a half-hour visit from arrival. The equipment is safe on a live filling station, and quiet enough for a residential street late at night. No money in advance; you settle up on the day. At the end, the VAT invoice and a report from the engineer go to you for your insurer. Misfuelling cover is included in plenty of insurance policies — and so use the wait to check yours. ## About Craigmillar and where it is Craigmillar is a suburban area in the City of Edinburgh, situated approximately 2.5 miles southeast of Edinburgh's city centre. Craigmillar sits on the coastal fringe of the city, with the Firth of Forth nearby, and has a relatively low elevation of around 60 metres. Craigmillar is characterized by its predominantly flat-type housing and is close to nearby places such as Niddrie and Prestonfield. ## AdBlue drains across City of Edinburgh, Craigmillar included Prestonfield and The Inch are among the towns near Craigmillar, a residential suburb, that the same teams cover, throughout EH postcodes. Quote a postcode beginning EH16 4, and the van gets there fastest. Shifting the vehicle isn't needed. Our technicians drain it where it is — a side street near Bristo Memorial Church, a lay-by on the way to Craigmillar Growers, a driveway. Ring and ask rather than assuming if you're near a boundary, or somewhere hard to describe, like the back of The White House, Craigmillar. ## The short version for Craigmillar drivers Always, the cap; then, the tip. Even so AdBlue in the diesel tank? Petrol in Diesel will drain it wherever it is, anywhere across City of Edinburgh: keep the car off and ring 0333 366 0103.