--- title: St Leonards Farm Park: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/st-leonards-farm-park-dorset/ location: St Leonards Farm Park county: Dorset latitude: 50.812750 longitude: -1.867750 service: AdBlue in a Diesel Tank updated: 2026-10-05 --- # How It Happens and How to Prevent It: AdBlue in a Diesel Tank in St Leonards Farm Park Stop here a minute if your diesel tank already has AdBlue in it: ignition off, motor off, then phone 0333 366 0103. Caught before the engine runs, it's normally a drain and a thorough flush, done where the vehicle is in St Leonards Farm Park. The remainder of this page explains why it happens and how to make sure it does not — handy if you are reading ahead of time. ## AdBlue in a diesel car, and its separate tank Diesel feeds your engine — yet many current diesels seen round St Leonards Farm Park and Grange Estate carry a second liquid too. Stored in a tank of its own, AdBlue is fed into the exhaust gas to clean it. Every tank comes with one filler of its own. Some motors keep the AdBlue filler in your boot or under the bonnet; plenty of others have both together behind one flap. At the pump, the diesel side gets filled constantly. Someone who has to stop and think where it goes usually fills the AdBlue side, from a bottle, and far less commonly. That gap is where the slip lives. ## St Leonards Farm Park: how AdBlue in the diesel tank happens Carelessness rarely explains it. Instead is three things lining up together. The warning comes first. As AdBlue runs low your car 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 drive off Cracklewood Close before work, or in the car park outside The Woodman on the way home. New-to-you cars are next, too. Hire cars, new cars and company cars put their fillers in new places, and the hand reaches for the cap used on the old one. A spouted bottle meets no obstacle at a diesel filler no more than at an AdBlue one. So the tip, after begun, carries on. It's a few seconds, whether in Tricketts Cross or right in the heart of St Leonards Farm Park. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a drive in Ameysford or a forecourt around St Leonards Farm Park, check these. They take a few seconds. - Blue and lettering: an AdBlue cap is commonly blue, or says "AdBlue", where a diesel cap usually does not. Trust the cap, not its position. - The size. On plenty of motors the AdBlue filler neck is the smaller of the two. - A label inside the fuel flap frequently shows which fuel goes where, on plenty of cars. Check for it. - The handbook shows where it is when the filler is not next to the diesel cap: the boot, or under the bonnet. - Picking up a hire or company car, say at the car park outside Bournemouth? Ask the person who drove the vehicle last before leaving, not when the light comes on. ## AdBlue top-ups that never reach the diesel tank Wherever around Dorset the light comes on, here is a routine for the day. - Stop on level, motor off, with time in hand — never rushing on the side of Ringwood Road. - Locate the AdBlue filler, read the cap, and say the word "AdBlue" out loud as unscrewing it. It sounds silly. It does the trick. - Leave your diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle. - Using the bottle's own spout, tip slowly — and stop when it is full or the bottle is empty. - Before you start the car, shut the cap and look a second time that your diesel cap never came off. Find during the second or third stage that the bottle went in the wrong tank? That is where you stop. Skip stage five altogether. ## AdBlue in the diesel tank already, around St Leonards Farm Park? Don't start the engine: that's where the short order of things starts. The fuel pump starts on many diesels as soon as your ignition is switched on — so leave it off. Do not top up with diesel to thin it: AdBlue does not mix with diesel, it sinks to the bottom of that tank, where your fuel is drawn from. At a forecourt — Texaco, Sainsbury's or another — the staff will usually help roll the car clear, when you ask. If you are on your own driveway in St Leonards Farm Park, leave the car where it sits. Where the motor has run already, pull over safely then switch the car off. St Leonards Farm Park lies under 15 miles from the M27; there, take the next exit. A short hop across St Leonards Farm Park is a smaller job than a run towards Salisbury, under 25 miles away, and so tell us about how far it went. ## Our arrival around St Leonards Farm Park, and what occurs next The van reaches the vehicle wherever it stopped — your own drive, near Hope Church Ferndown, or outside Oakhurst Community First School. We ask what got in, about how much, and if it's run, since the answers decide this work and the quote. That price is given on the call, before any van leaves. After that: a drain, then a thorough flush of the whole system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own — which is why that matters more here than with petrol. A test is at the end: before that, fresh diesel is added, and the fuel filter is flushed or replaced if necessary. The motor is fired up next and checked to be sure it runs correctly, all before our engineers leave. Most jobs are finished in about half an hour once our technicians arrive, as long as your motor has not run — and the pumps we use are safe on a live forecourt and quiet at night outside a house. Nothing in advance; you settle up on the day. At the end, a VAT invoice and the report from the engineer are handed to you for the insurer. It's worth checking your policy as the van travels to you: misfuelling cover is included with plenty of policies. ## About St Leonards Farm Park St Leonards Farm Park is a suburban area located on the riverside in Dorset, with an elevation of around 15 metres. St Leonards Farm Park sits near the towns of Ferndown and West Moors, and is close to the village of Tricketts Cross. St Leonards Farm Park is characterized by its predominantly detached housing stock, and is situated approximately 18 miles from the city of Salisbury. St Leonards Farm Park is also within commuting distance of London, being around 89 miles away. ## AdBlue drains in St Leonards Farm Park and across Dorset As a residential suburb, St Leonards Farm Park shares its vans surrounding places — Ferndown, West Moors — all the way through BH postcodes and the surrounding area beyond. Quickest of all: quote a BH22 0 postcode for our van. The car doesn't need to move. Anywhere it stands — beside Heatherlands Centre, in a lay-by en route to Ford Lane Recreation Ground, at home — that's where it is drained. Tricky to explain, like the back of Pinehurst Community Church? By a border? Asking is better than guessing, and so ring. ## For St Leonards Farm Park people, the short version Always, the cap; after that, the pour. Still AdBlue in your diesel tank? Petrol in Diesel can drain it where it stands, wherever in Dorset: switch the vehicle off then call 0333 366 0103.