--- title: Upper Persley: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/upper-persley-aberdeen-city/ location: Upper Persley county: Aberdeen City latitude: 57.185190 longitude: -2.175340 service: AdBlue in a Diesel Tank updated: 2026-10-21 --- # Preventing AdBlue in a Diesel Tank in Upper Persley: Why It Occurs Leave your engine and ignition off and phone 0333 366 0103 now — reading can wait when AdBlue is already in the diesel tank. Normally, if your engine hasn't run, it is emptied and thoroughly flushed where your car sits around Upper Persley. Here before the event? Then the rest explains why it comes about and what to prevent it happening at all. ## AdBlue in a diesel vehicle: two tanks, two fillers No single liquid but two: that's how many newer diesels near Upper Persley and Heathryfold run, with diesel feeding the engine. Your exhaust, not your engine, is where AdBlue ends up: sprayed into the gas to clean them, from a separate tank. Each tank has its own filler. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. Topping up the diesel side at the petrol pump goes on constantly. Far less often, the AdBlue side gets filled — normally from a bottle, by someone thinking about where it goes. It is in the gap that the slip happens. ## How AdBlue in the diesel tank happens in Upper Persley Three things tend to line up, and carelessness is rarely one of them. Hurry follows from the warning. The vehicle tells you as AdBlue runs low, and an empty tank puts the vehicle into limp mode — so the top-up happens in a rush, before work on a driveway off Mill Park View, or heading home in the car park outside The Bankhead Inn. Next, the hand reaches for the cap it knew on the old car — since a rental car, a new vehicle or a company car puts the fillers where your last one didn't. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, and so nothing stops the pour once it has started. The same few seconds settle it, in the middle of Upper Persley or out in Bankhead. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a driveway in Mains of Grandhome or a forecourt in Upper Persley, check these. They take a couple of seconds. - Where it sits misleads; the cap does not. AdBlue caps are often blue or bear the word "AdBlue" — diesel ones normally do not. - Look at the size: the smaller filler neck is, on plenty of motors, the AdBlue one. - A label inside the fuel flap frequently says which fuel goes where, on many motors. Look for it. - In the boot or under the bonnet: that's where the filler is if it's not by your diesel cap, and the handbook tells you which. - The person who drove the car last. On a hire or company car collected from somewhere like the car park at Dyce, ask before you leave, not when the light comes on. ## AdBlue top-ups that never reach your diesel tank A routine for the day the light comes on, wherever around Aberdeen City that is. - Not in a rush on the side of A947, not on a slope, not with the motor running: park and switch off first. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds daft 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. - Close the cap and check once more. Make sure the diesel cap was never opened. Only then start your car. Find at the second or third stage that AdBlue went in the diesel tank? That's where you stop. Leave out step five altogether. ## Already put AdBlue in your diesel tank in Upper Persley? What follows is a short order of things, starting with no starting the motor. On many diesels the ignition alone runs the fuel pump, so do not switch it on. AdBlue doesn't mix with diesel — it sinks to the bottom of the tank, where the fuel is drawn from — so do not top up with diesel to dilute it. On a forecourt — Shell, BP or another — the attendants will normally help push your car clear, when you ask. If you are on your own driveway in Upper Persley, leave it where it is. Stop as soon as it is safe and switch off, if the motor has already run. Leave the M90 — over 50 miles out of Upper Persley — at the first exit. About how far did it go? Crossing Upper Persley is smaller a job than a run of under 5 miles towards Aberdeen, so say. ## Our arrival around Upper Persley, and what takes place next Our van reaches your car wherever it stopped — your own drive, beside Aberdeen Hindu Temple, or by the local primary school. We ask what went in, about how much, and whether it's run, because those replies decide the work and the price. Nobody sets off until you've heard the quote by phone. Then the tank is cleared and the fuel system purged thoroughly. With AdBlue that matters 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. A test is at the end: before that, fresh diesel is added, and the fuel filter is flushed or replaced if necessary. After that our engineers start the engine and confirm it runs properly before leaving. Using pumps safe on a busy forecourt and quiet enough for use outside a house at night, most jobs where your motor has not run need about half an hour after our engineers arrive. The insurer will ask for an engineer's report and your VAT invoice, and both are yours once this job is done. Payment comes on the day, with no money upfront. Before we get there, have a look at your policy; many include cover for misfuelling. ## About Upper Persley Upper Persley is a locality situated on the banks of the River Don in Aberdeen City, with a mix of residential and industrial areas. Upper Persley has a relatively low elevation of 39 metres and is located approximately 3.9 miles from Aberdeen city centre. Upper Persley is characterized by its predominantly flat-type housing and is close to nearby places such as Bankhead and Bucksburn. ## AdBlue drains in Upper Persley and across Aberdeen City Upper Persley is a small village, and our teams that cover it also work the places near it, Bucksburn and Stoneywood among them, across the AB postcode area. Quickest of all: quote a AB21 9 postcode to our van. The vehicle stays where it is. A driveway, a lay-by on the way to New Polo Park, a side street close to Alexander Pirie and Sons Ltd War Memorial: our engineers drain the car where it is. If you're close to a border, or somewhere hard to describe like the back of St Machar's Church, ring and ask rather than guessing. ## The short version for Upper Persley drivers Always, the cap; then, the tip. Still AdBlue in your diesel tank? Petrol in Diesel can empty it where it stands, anywhere around Aberdeen City: keep it off then call 0333 366 0103.