--- title: AdBlue in a Diesel Tank Lawshall: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/lawshall-suffolk/ location: Lawshall county: Suffolk latitude: 52.163020 longitude: 0.711350 service: AdBlue in a Diesel Tank updated: 2026-10-06 --- # AdBlue in a Diesel Tank in Lawshall: How It Occurs and How to Avoid It AdBlue already in the diesel tank? In that case put this page down a moment, keep your ignition and engine off, and call 0333 366 0103. Caught before the motor runs, it's usually a drain and a thorough flush, done where your car is in Lawshall. Here before the event? Then what follows explains how it comes about and how to prevent it happening at all. ## AdBlue in a diesel vehicle: two tanks, two fillers Not one liquid but two: that's how many newer diesels around Lawshall and Hanningfields Green carry, with diesel for the engine. Stored in a tank of its own, AdBlue is sprayed into your exhaust gas to clean it. Separate tanks, separate fillers. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. The diesel side is filled at the pump all the time. A driver who has to stop and think where it goes normally fills the AdBlue side, from a bottle, and far less commonly. It is in the gap that the error lives. ## How does AdBlue in your diesel tank happen around Lawshall? Carelessness seldom causes it. Instead is three things lining up at once. On a drive off Bury Road before work, or in the car park outside The Swan heading home: that's where the rushed top-up happens. Why the rush? As AdBlue gets low your car tells you, and once it is gone, limp mode follows. The old car's filler is where the hand goes — yet a hire car, a new vehicle or a company car puts the fillers elsewhere. That is the second thing: an unfamiliar motor. A spout-topped bottle finds no resistance at a diesel filler no more than at an AdBlue one. And so the pour, once begun, keeps on. Whether it takes place in Harrow Green or the middle of Lawshall, it's the same few seconds. ## Telling the AdBlue filler from your diesel filler A couple of seconds is all the checks take — so run through them before you pour anything, on a driveway in Stanningfield or a forecourt in Lawshall. - Colour and marking: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap usually doesn't. Go by the cap, not its position. - Look at the size: the smaller neck is, on many motors, the AdBlue one. - A label inside the fuel flap frequently shows which fuel goes where, on plenty of cars. Check for it. - Cannot see it beside the diesel filler? In that case look beneath the bonnet or inside your boot — the owner's manual says where. - Check with the person who drove it last — before you leave, not when the light comes on — when you collect a hire or company car from somewhere like the car park outside Bury St Edmunds. ## AdBlue top-ups that never reach your diesel tank When the light comes on, wherever across Suffolk, use this routine. - Pull in on level, motor off, with time to spare — never hurried on the side of Lawshall Row. - Find the AdBlue filler, read the cap, and speak the word "AdBlue" aloud while unscrewing it. It seems daft. It works. - 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, pour slowly — and stop when it is full or the bottle is empty. - Close the cap, and check once more — confirm your diesel filler remained closed throughout. Only then, start the car. Discover at the second or third step that the bottle went in the diesel tank? That's where you stop. Do not go on to step five. ## AdBlue in your diesel tank already, in Lawshall? Then the order of things is short. Do not start your engine. On plenty of diesels the ignition alone runs the fuel pump, so don't switch it on. Do not top up with diesel to dilute it: AdBlue does not mix with diesel, it sinks to the bottom of that tank, where your fuel is sucked from. If you're at a forecourt, whether it is the the nearest petrol station or the another forecourt nearby, ask the staff to help push the car away from the pump. If you're on your own drive in Lawshall, leave it where it stands. Already started? Stop once it is sensible, then turn off. On the M11, under 25 miles from Lawshall, that means the next junction. Roughly how far did it go? Hopping across Lawshall is smaller work than a run of under 25 miles towards Colchester, so tell us. ## When we get there in Lawshall, what happens? By All Saints' Church of England Voluntary Controlled Primary School, Lawshall, near Lawshall Village Hall or on your own driveway: wherever the vehicle has stopped, we come to it. Which liquid went in, the quantity, and if it ran: we ask because the answers decide both work and quote. Nobody heads out before you have had the quote over the phone. After that: draining, then a full flush of the entire system. Unlike petrol, AdBlue forms crystals and attacks certain fuel-system metals, and neither washes away unaided. Hence it counts more. Your filter is cleaned, or replaced where it needs to be; fresh diesel goes in; and the car is tested. We do not leave until it has been started and is running properly. Unrun cars mostly mean a half-hour visit from arrival. The kit is fine on a live filling station, and quiet enough for a residential street after dark. Paying is on the day, not upfront, and you receive the documents your insurer wants: an engineer's report and a VAT invoice. It's worth looking at your insurance as the van travels to you: misfuelling cover comes with plenty of policies. ## About Lawshall, for a moment Lawshall is a small village in Suffolk, situated in the eastern part of the county, with an elevation of around 101 metres. Lawshall lies approximately 57.8 miles from London and 20.5 miles from Colchester, making it a rural community with easy access to larger towns. Lawshall is characterized by its predominantly detached housing and quiet, residential atmosphere, surrounded by nearby places such as Harrow Green and Audley End. Lawshall has a population of around 662 people, according to recent estimates. ## AdBlue drains across Suffolk, Lawshall included Lawshall is a rural village, and our vans that cover it also work the places around it, Audley End and Hanningfield Green among them, across the IP postcode area. The van reaches you fastest with a postcode starting IP29 4. The car doesn't need to shift. Our technicians drain it where it is — a side street near All Saints Church, Lawshall, a lay-by on the way to Hoyle's Grove, a drive. Guessing doesn't help behind Lawshall Village Sign, on a border, or anywhere hard to pin down; phone and check. ## For Lawshall motorists, the short version Tip no AdBlue until you have read the cap. Petrol in Diesel empties it on the spot, anywhere in Suffolk, if AdBlue has gone in the diesel tank anyway — so leave it off and call 0333 366 0103.