--- title: Niddrie: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/niddrie-city-of-edinburgh/ location: Niddrie county: City of Edinburgh latitude: 55.932460 longitude: -3.127380 service: AdBlue in a Diesel Tank updated: 2026-10-12 --- # How It Happens and How to Prevent It: AdBlue in a Diesel Tank in Niddrie Leave the motor and ignition off and call 0333 366 0103 now — the rest can wait if AdBlue is already in your diesel tank. Around Niddrie, finding it before your motor turns usually means draining and a full flush on the spot. The remainder of this page covers why it occurs and how to ensure it doesn't — useful if you're reading ahead of time. ## AdBlue in a diesel motor: two tanks, two fillers Diesel feeds your engine — yet plenty of current diesels seen around Niddrie and Newcraighall hold another fluid as well. Your exhaust, not the engine, is where AdBlue ends up: sprayed into the gas to fresh it, from a separate tank. There is a filler on every tank. 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 fuelled at the pump all the time. Seldom topped up, AdBlue normally goes in out of a bottle, poured by a driver who must stop and think what cap it needs. That gap is where the slip lives. ## Niddrie: how AdBlue in your diesel tank happens Rarely is it carelessness: usually three things coincide. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out altogether, the car goes into limp mode. So the top-up is done in a hurry: on a driveway off Niddrie Marischal Gardens before work, or in the car park at Oman's on the way home. Then, the hand reaches for the cap it would have used on the old car — since a hire car, a new motor or a company car places the fillers where your last one didn't. Lastly, the bottle goes in: a diesel filler or AdBlue filler, it slides in as readily, and after the pour begins, nothing stops it. Whether it occurs in Craigmillar or the middle of Niddrie, it is the same few seconds. ## Which filler is for AdBlue, and which for diesel? Before you pour anything, whether on a driveway in Prestonfield or a forecourt around Niddrie, check these. They take a few seconds. - Check the cap rather than going by position: AdBlue caps are often blue or marked "AdBlue", and diesel ones usually aren't. - On plenty of motors, the size gives it away: AdBlue gets the smaller filler neck. - Open the flap and look for a label — plenty of cars mark what goes in which filler right there. - The handbook. If your 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 the car last. On a hire or company car picked up from somewhere like the car park at Brunstane, ask before you leave, not when the light comes on. ## How to top up without AdBlue in your diesel tank On the day the warning comes on — anywhere it is in City of Edinburgh — a simple routine to follow. - Not in a rush on the side of Maltman Street, not on a slope, not with your motor running: park then switch off first. - Say "AdBlue" out loud as you unscrew the cap, once finding the AdBlue filler and reading it. Daft, yes, yet it works. - The two behind a single flap? So confirm the cap on the diesel side stays closed before raising the bottle. - Slowly is best, through the bottle's own spout, till it is full or the bottle runs out. - Close the cap, then check again — confirm the diesel cap stayed shut the whole time. Only then, start the car. Discover at the second or third stage that AdBlue went into the wrong filler? That's where you stop. Skip step five altogether. ## Put AdBlue in the diesel tank in Niddrie already? Then the order of things is short. Do not start the motor. Don't switch your ignition on; on many diesels that alone runs the fuel pump. Topping up with diesel won't weaken it: rather than mixing, AdBlue drops to the bottom of the tank, just where the fuel is taken from. The attendants at Wm Turnbull, Asda or any forecourt will usually help to push the vehicle clear if you ask. Your own drive around Niddrie is where it stays. Where the engine has run already, pull over somewhere safe then switch the vehicle off. On the M8, under 10 miles from Niddrie, that means the next junction. Tell us about how far it went: a run towards Edinburgh, under 3 miles away, is a bigger job than a short hop across Niddrie. ## Our arrival in Niddrie, and what happens next Outside the local primary school, near Pir Sultan Abdal Cultural Centre or on your own driveway: wherever the car has stopped, we come to it. The answers decide the work and our price, so our technicians ask what went in, roughly how much, and if it has run. You get that quote by phone, before anybody sets off. Next: draining, then a full flush of the entire system. Unlike petrol, AdBlue forms crystals and eats at certain fuel-system metals, and neither washes out unaided. Hence it matters more. Filter cleaned or, where needed, replaced; clean diesel in; then a check of the car. We do not leave until it has been started and is running smoothly. Unrun vehicles usually need a half-hour job from arrival. The kit is fine on a live forecourt, and hushed enough for a driveway after dark. Payment is on the day, not upfront, and you are given the documents an insurer asks for: an engineer's report and a VAT invoice. Misfuelling cover is part of plenty of insurance policies — so use the wait to look at yours. ## About Niddrie itself Niddrie is a coastal suburban area in the City of Edinburgh, situated approximately 2.8 miles from Edinburgh city centre. Niddrie lies at an elevation of 46 metres, with the area predominantly consisting of flat housing. Niddrie is close to nearby places such as Craigmillar, Cleikimin, and Duddingston, and is home to a population of around 7830 residents. ## AdBlue drains across City of Edinburgh, Niddrie included Being a residential suburb, Niddrie has the same vans as surrounding places — Cleikimin, Duddingston — right across EH postcodes and the wider area beyond. Fastest of all: quote a EH16 4 postcode for our van. Shifting your car isn't needed. Our technicians drain it where it is — a side street close to Catholic Church of St Teresa, a lay-by on the way to Thistle Foundation Village, a driveway. If you are near a boundary, or somewhere hard to describe like the back of Richmond Craigmillar Church, ring and ask instead of assuming. ## The short version for Niddrie motorists First, the cap; after that, the tip. Even so AdBlue in your diesel tank? Petrol in Diesel can empty it wherever it is, anywhere around City of Edinburgh: keep it off then phone 0333 366 0103.