--- title: AdBlue in a Diesel Tank St Aethans: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/st-aethans-moray/ location: St Aethans county: Moray latitude: 57.698940 longitude: -3.475000 service: AdBlue in a Diesel Tank updated: 2026-10-14 --- # AdBlue in a Diesel Tank in St Aethans: Why It Occurs and How to Prevent It If AdBlue is already in your diesel tank, stop reading for a moment: leave the engine and your ignition off then phone 0333 366 0103. Caught before the motor runs, it is usually a drain and a thorough flush, done where the vehicle is around St Aethans. If you are reading before it has happened, the rest of this page is about why it takes place and how to make sure it does not. ## AdBlue in a diesel car: two tanks, two fillers No single fluid but two: that's how many modern diesels around St Aethans and Backlands run, with diesel feeding the engine. Kept in a tank of its own, AdBlue is sprayed into the exhaust stream to clean it. There's a filler on each tank. Some motors keep the AdBlue filler in your boot or under the bonnet; plenty more have both side by side behind one flap. At the petrol pump, the diesel side gets filled constantly. Far less regularly, the AdBlue side gets topped up — mostly from a bottle, by someone working out where it goes. The slip lives in that gap. ## How does AdBlue in the diesel tank occur in St Aethans? It is rarely carelessness. Three things tend to line up. Haste comes from the warning. The vehicle tells you as AdBlue runs low, and an empty tank sends it into limp mode — so the top-up gets done quickly, before work on a drive off Torfness Place, or on the way home in the car park outside the pub in the village. The old car's filler is where the hand goes — yet a rental car, a new car or a company car puts the fillers elsewhere. That's the second factor: a strange motor. Nothing stops the pour once it has started, since a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Burghead or the heart of St Aethans: it is the same few seconds either way. ## Telling the AdBlue filler from the diesel filler Look at these before pouring, at a forecourt around St Aethans or a drive out in Hopeman. A few seconds, no more. - The cap. The AdBlue cap is regularly blue, or marked "AdBlue". The diesel cap normally isn't. Read it instead of going by where it sits. - On many motors, the size gives it away: AdBlue has the smaller filler neck. - Open the flap and look for a label — plenty of vehicles mark what goes in each inlet just there. - The handbook. If the filler isn't by your diesel cap, it is in the boot or under the bonnet, and the handbook says 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 outside Elgin. ## Topping up AdBlue without it reaching your diesel tank When the light comes on, anywhere in Moray, use this routine. - Stop somewhere level, motor off, with time to spare — not rushing on the side of B9040. - Silly as it sounds, speaking "AdBlue" aloud as you unscrew the cap works — after you've found the filler and read the cap. - The two under one flap? Then confirm the cap on the diesel side is still shut before raising the bottle. - Stop once that tank is topped up or the bottle is empty; until then, tip slowly through the built-in spout. - Close the cap, then check once more — making sure the diesel cap stayed closed throughout. Only then, start the car. If at stage two or three you find you have already poured into the diesel side, stop there. Stage five is off limits. ## Already put AdBlue in your diesel tank around St Aethans? What follows is a short order of things, beginning with no starting the motor. On plenty of diesels the ignition alone runs the fuel pump, so don't switch the vehicle on. Thinning it with extra diesel fails, since AdBlue sinks to the bottom instead of mixing — and that's where the fuel is pulled from. The attendants at the nearest petrol station, another forecourt nearby or another forecourt will usually lend a hand pushing your car away if asked. If you're on your own drive around St Aethans, leave it where it sits. Stop as soon as it is safe then switch off, if your engine has already run. Come off the M90 — over 50 miles out of St Aethans — at the next exit. Tell us roughly how far it went: a run towards Inverness, under 50 miles away, is a bigger job than a short hop across St Aethans. ## St Aethans: what occurs when our engineers arrive Our van reaches your car anywhere it has come to rest — your own drive, near Burghead Free Church, or by the local primary school. Our technicians ask what went in, roughly how much, and whether it's run, because the answers settle the work and our price. During the call itself, you hear the quote — ahead of anything else. Emptying the tank comes next, then a thorough flush of the fuel system. Much more than with petrol, it matters with AdBlue: the crystals form, certain metals corrode, and nothing clears out unaided, no matter how long it sits. Once your filter is flushed — or renewed, where needed — fresh diesel is added, and then your car gets tested. Next we start the engine and check it runs smoothly before leaving. Using pumps safe on a busy forecourt and quiet enough for use outside a house at night, most jobs in which your engine has not run take roughly half an hour once our technicians are there. Paying happens on the day, not upfront, and you are given the paperwork your insurer wants: an engineer report and a VAT invoice. It's worth looking at your insurance while we travel to you: misfuelling cover comes with many policies. ## About St Aethans and where it is St Aethans is a coastal suburban area in Moray, situated near the towns of Burghead and Cummingston, with St Aethans itself lying at an elevation of 32 metres. St Aethans is characterised by its predominantly detached housing stock, reflecting the area's residential nature. St Aethans is located within commuting distance of Inverness, the nearest city, and St Aethans benefits from its proximity to the scenic Moray coastline. ## AdBlue drains around St Aethans and across Moray Over IV postcodes, our teams that cover St Aethans — a residential suburb — work the surrounding locations too, Charlestown and Cummingston included. A postcode starting IV30 5 gets the van to you fastest. The car doesn't need to move. A drive, a lay-by on the way to Forest Park, a side street near Burghead Library: we drain it where it sits. Ring and ask rather than assuming if you are near a boundary, or somewhere hard to describe, like the back of Burghead Parish Church. ## In short, for St Aethans people First, the cap; then, the pour. Petrol in Diesel drains it on the spot, anywhere around Moray, if AdBlue has gone in your diesel tank anyway — so leave the vehicle off then phone 0333 366 0103.