--- title: Explained: AdBlue in a Diesel Tank Westhill canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/westhill-aberdeenshire/ location: Westhill county: Aberdeenshire latitude: 57.153370 longitude: -2.276230 service: AdBlue in a Diesel Tank updated: 2026-10-21 --- # Why It Occurs and How to Avoid It: AdBlue in a Diesel Tank in Westhill If AdBlue is already in your diesel tank, stop reading for a moment: leave the motor and your ignition off then phone 0333 366 0103. A drain plus a thorough flush, carried out right where your vehicle sits around Westhill, is normally what it needs when caught before the engine runs. Nothing happened yet? Further down, the rest of the page covers the reasons it occurs and the ways to avoid it for good. ## AdBlue in a diesel motor: two tanks, two fillers Plenty of newer diesels on the roads round Westhill and Kirkton of Skene carry two liquids, not one. Diesel goes to the engine. Stored in a tank of its own, AdBlue is sprayed into the exhaust stream to clean it. Different tanks, different fillers. On a lot of cars 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 filled at the petrol pump all the time. Rarely filled, AdBlue normally comes from a bottle, poured by a driver who must stop and think what cap to use. The slip lives in that gap. ## How does AdBlue in your diesel tank occur around Westhill? It is rarely carelessness. Three things tend to line up. To start with, the warning. Low AdBlue brings a message from the car, and letting it run dry leads to limp mode — so a hurried top-up, maybe before work off Old Skene Road, or at Shepherds Rest on the way home that evening. Unfamiliar motors are second, as well. Hire cars, new vehicles and company vehicles put their fillers differently, and habit goes for the cap used on the old one. No part halts the pour after it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Elrick or the heart of Westhill: it is the same few seconds in both. ## How to tell the AdBlue filler from the diesel one Be it a Westhill forecourt or a driveway out in Blacktop, spend a few seconds over these before any goes in. - The cap. The AdBlue cap is often blue, or marked "AdBlue". The diesel cap normally is not. Read it instead of going by position. - The size. On plenty of motors 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. - The handbook shows where it is if your filler isn't next to the diesel cap: the boot, or under the bonnet. - Whoever had it before knows. Ask as you collect a rental or company car — from Dyce's car park, perhaps — not once the warning comes on. ## Keeping AdBlue out of the diesel tank when you top up The day the light goes on, wherever across Aberdeenshire, follow this routine. - Turn off once parked — flat ground, motor stopped, and not rushed beside Westhill Road on the verge. - Silly as it sounds, speaking "AdBlue" out loud while you unscrew the cap works — after you have found the filler and read it. - If both sit under one flap, check the diesel cap is still closed before you lift the bottle — then leave the car on. - Gently is best, through the bottle's own spout, until it's full or the bottle is empty. - Before starting the car, shut the cap and check a second time that the diesel cap was never opened off. If at step two or three you find you have already poured into the diesel side, stop there. Stage five is off limits. ## AdBlue in the diesel tank already, in Westhill? What follows is a short order of things, beginning with not starting the motor. On plenty of diesels the ignition alone runs the fuel pump, so don't switch it on. Filling up with diesel will not weaken it: instead, AdBlue sinks to the base of the tank, just where the fuel is drawn from. At a forecourt — Tesco, BP or any other — the attendants will usually help push your car clear, if you ask. On your own drive around Westhill? Then your car stays where it is. Where the motor has been run by now, stop somewhere safe and turn it off. On the M90, over 50 miles from Westhill, that means the next junction. Distance matters — a short hop across Westhill makes a smaller job than driving under 10 miles towards Aberdeen — so say about how far it went. ## Westhill: what happens when we get there By the local primary school, near Westhill Shopping Centre or on your own drive: wherever your car has stopped, our engineers come to it. Both the work and our quote depend on three answers — which liquid, what amount, and whether it's run — so our engineers ask. On the call itself, you hear our quote — before anything else. The fuel system is then purged thoroughly, after that tank is emptied. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. A test is at the end: before that, fresh diesel is added, and the filter is flushed or changed if necessary. The engine is started next and checked to make sure it runs correctly, all before our engineers go. Using pumps safe on a busy forecourt and quiet enough to use outside a house at night, most jobs in which the motor hasn't run need about half an hour after we arrive. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Wrong-fuel cover is included in plenty of insurance policies — and so make use of the wait to look at yours. ## About Westhill, briefly Westhill is a town in Aberdeenshire, situated inland at an elevation of 133 metres, approximately 6.8 miles west of Aberdeen. Westhill has a population of around 7178 people, with a predominance of detached housing. Westhill is close to several nearby communities, including Elrick, Kingswells, and Cairnie, and is located about 399.5 miles north of London. ## Westhill and Aberdeenshire: AdBlue drains across the area Kingswells and Cairnie are among the towns near Westhill, a town, that the same vans cover, over AB postcodes. A postcode starting AB32 6 gets the van to you fastest. The vehicle doesn't need to shift. Our technicians drain it where it is — a side street near Westhill Library, a lay-by on the way to Denman Park, a drive. If you are near a boundary, or somewhere hard to explain like the back of Trinity Church, ring and ask instead of guessing. ## Westhill motorists: the short version Read the cap before you pour. If AdBlue has gone in your diesel tank all the same, leave the car off and ring 0333 366 0103. Petrol in Diesel clears it where it sits, anywhere around Aberdeenshire.