--- title: AdBlue in a Diesel Tank Chiswell? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/chiswell-dorset/ location: Chiswell county: Dorset latitude: 50.560450 longitude: -2.448360 service: AdBlue in a Diesel Tank updated: 2026-10-06 --- # Chiswell: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and the ignition off then phone 0333 366 0103. A drain plus a thorough flush, done right where the vehicle stands in Chiswell, is usually all it takes when found before your engine runs. Not happened yet? Below, the page covers the why it takes place and the ways to avoid it altogether. ## AdBlue in a diesel vehicle, and its separate tank No single liquid but two: that's how plenty of newer diesels near Chiswell and Grove run, with diesel for the motor. AdBlue's own tank keeps it, and from there it goes to your exhaust, where spraying cleans the fumes. Each tank has its own filler. Plenty of motors share a single flap for both, while some put the AdBlue filler to the boot or under the bonnet. The diesel side is fuelled at the pump all the time. Rarely filled, AdBlue normally goes in from a bottle, poured by a driver who must stop and think which cap to use. That gap is where the slip lives. ## How AdBlue in the diesel tank happens around Chiswell Carelessness seldom explains it. What does is three things lining up at once. 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 Brandy Row before work, or in the car park outside Cove House Inn on the way home. Next, your hand goes for the cap it knew on the old vehicle — because a hire car, a new vehicle or a company car puts the fillers where your last one did not. A spout-topped bottle meets no obstacle at a diesel filler no more than at an AdBlue one. So the pour, once started, keeps on. Whether it occurs in Fortuneswell or the middle of Chiswell, it's the same few seconds. ## Which filler is for AdBlue, and which for diesel? Be it a Chiswell forecourt or a drive out in Easton, take a couple of seconds on these before any goes in. - Where it sits can mislead; the cap does not. AdBlue ones tend to be blue or carry the name "AdBlue" — diesel caps normally do not. - Plenty of motors give AdBlue the smaller neck of the two. - Look inside your fuel flap: many vehicles have a label there showing which fuel goes where. - Can't see it next to your diesel inlet? In that case look beneath the bonnet or in your boot — the handbook will say which. - 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 Weymouth. ## Keeping AdBlue out of the diesel tank when you top up The day the light goes on, anywhere around Dorset, follow this routine. - Stop on level, engine off, with time to spare — not rushing on the side of Chiswell. - Daft as it sounds, saying "AdBlue" out loud while you unscrew the cap works — once you've found the filler and read it. - Leave your diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Pour slowly, using the bottle's own spout. Stop when it is full or when the bottle is empty. - Before starting the vehicle, shut the cap and look again that your diesel cap never opened off. Stop there if you find, at step two or three, that you have already poured into your diesel side. Never go on to stage five. ## Already put AdBlue in your diesel tank around Chiswell? Short order, then. Top of that: the motor remains unstarted. Leave your ignition off too, since on plenty of diesels switching it on by itself starts the pump. Topping up with diesel will not dilute it: instead, AdBlue sinks to the base of that tank, just where fuel is drawn from. The staff at Shell, Esso or another forecourt will usually help pushing the vehicle away if asked. Leave it where it is if you're on your own drive around Chiswell. If the engine has already run, stop as soon as it is safe then switch off. On the M5, under 50 miles from Chiswell, that means the next junction. A short hop across Chiswell is a smaller job than a run towards Salisbury, under 50 miles away, and so tell us roughly how far it went. ## When our technicians arrive in Chiswell, what occurs? Wherever the vehicle came to rest, whether by St George's Foundation Primary School, beside John Groves & Sons or at home, the van comes to it. Those replies decide this work and the price, and so our technicians ask what got in, about how much, and whether it has run. During the call itself, you are told the quote — before dispatch. Next: a drain, then a thorough flush of the entire system. Not like petrol, AdBlue forms crystals and attacks some fuel-system metals, and neither washes out unaided. Hence it matters more. After the fuel filter is flushed — or renewed, where required — clean diesel goes in, and then your car gets tested. Before we go, we fire it up and make sure that it's running properly. With pumps fine on a busy forecourt and quiet enough to use outside a house at night, most jobs in which your engine has not run need about half an hour after our engineers are there. Your insurer usually wants the engineer's report and the VAT invoice, and both are yours once the job is done. Payment is on the day, with no deposit. It is worth checking your insurance as the van travels to you: misfuelling cover is included with many policies. ## About Chiswell, briefly Chiswell is a small suburban area on the Isle of Portland in Dorset, situated on the coast at a low elevation of around 7 metres. Chiswell is close to other nearby places such as Fortuneswell and Castletown, and is near the busy Portland Port. Chiswell has a population of approximately 2806 people, living in predominantly terraced housing. ## AdBlue drains round Chiswell, and Dorset beyond Chiswell is a residential suburb, and the vans that cover it also work the towns around it, Castletown and Portland Port among them, across the DT postcode area. Give a postcode that starts DT5 1, and our van gets there quickest. There's no need to shift your car. Anywhere it stands — beside United Reformed Church, in a layby heading to Victoria Gardens, on a drive — that is where it gets drained. Ring and ask rather than guessing if you're close to a border, or somewhere hard to describe, like the back of Chiswell Walled Garden. ## The short version for Chiswell motorists Read the cap before you pour. Still AdBlue in your diesel tank? Petrol in Diesel will empty it where it is, anywhere across Dorset: keep the vehicle off then phone 0333 366 0103.