--- title: Explained: AdBlue in a Diesel Tank Week canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/week-devon/ location: Week county: Devon latitude: 50.448650 longitude: -3.720160 service: AdBlue in a Diesel Tank updated: 2026-10-06 --- # AdBlue in a Diesel Tank in Week: Why It Occurs and How to Prevent It AdBlue already in the diesel tank? Then put this page down for now, leave your ignition and engine off, and ring 0333 366 0103. Usually, if your engine hasn't turned, it is drained and thoroughly rinsed where the car is in Week. Here before the event? In that case the rest covers how it comes about and how to prevent it happening at all. ## AdBlue in a diesel car: two tanks, two fillers Diesel goes to the motor — but plenty of current diesels seen around Week and Puddaven hold a second liquid as well. Kept in a tank of its own, AdBlue is fed into your exhaust gas to clean it. There is a filler for every tank. Under one flap, side by side: that's the arrangement on a lot of cars. Elsewhere, AdBlue's filler is under the bonnet or in your boot instead. At the petrol pump, the diesel side is topped up all the time. Much less often, the AdBlue side gets topped up — mostly from a bottle, by someone thinking about where it goes. The mistake lives in that gap. ## Week: how AdBlue in your diesel tank occurs Carelessness seldom explains it. What does is three things lining up together. On a driveway off Sawfield Drive before work, or in the car park outside The Cott Inn heading home: that is where the hurried top-up happens. What is the reason for the rush? As AdBlue runs low the car warns you, and if it's empty, limp mode kicks in. Unfamiliar motors come second, as well. Hire cars, new motors and company cars put their fillers differently, and the hand goes for the cap used on the old one. Nothing halts the tip once it has started, because a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. Whether it happens in Shinners Bridge or the middle of Week, it's the same few seconds. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a drive in Dartington or a forecourt in Week, check these. They take a few seconds. - Where it sits can mislead; the cap doesn't. AdBlue caps are often blue or bear the name "AdBlue" — diesel ones usually don't. - Plenty of cars give AdBlue the smaller filler of the two. - Open the filler flap and look for a label — many motors mark which belongs in each inlet right there. - The handbook shows where it lives if the filler is not next to your diesel cap: the boot, or under the bonnet. - The person who drove the car last. On a hire or company car picked up from somewhere like the car park outside Totnes, ask before you leave, not when the light comes on. ## Topping up AdBlue without it reaching the diesel tank Anywhere in Devon the light comes on, here is a routine for that day. - Switch off after you park — level ground, motor off, and not in a rush by Bidwell Road at the roadside. - Daft as it sounds, speaking "AdBlue" out loud as you unscrew the cap works — once you have found your 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. - Slowly is best, through the bottle's own spout, until it is full or the bottle runs out. - Before starting the vehicle, shut the cap and look a second time that your diesel cap never came off. Find during the second or third step that AdBlue went into the diesel tank? That is where you stop. Never carry on to step five. ## Already put AdBlue in the diesel tank around Week? Short order, then. Top of it: your motor stays unstarted. Don't switch the ignition on; on plenty of diesels that alone runs the fuel pump. Topping up with diesel will not weaken it: rather than mixing, AdBlue drops to the base of your tank, just where the fuel is taken from. At a forecourt — Texaco, Morrisons or another — the staff will normally help roll the car clear, if you ask. At home in Week? So the car stays put. Stop as soon as it is safe then switch off, if the engine has already run. The next exit means the place to come off when you are on the M5, under 25 miles from Week. Tell us roughly how far it went: a run towards Plymouth, under 25 miles away, is a bigger job than a short hop across Week. ## What takes place when our technicians get there around Week Anywhere the vehicle has stopped, whether by Dartington Church of England Academy, beside St Mary's Church or on your own drive, our van travels to it. Which liquid went in, the quantity, and whether it ran: our technicians ask because the replies decide both work and quote. No one heads out until you've heard the quote over the phone. Your system is then rinsed thoroughly, once your tank is drained. Unlike petrol, AdBlue leaves crystals and eats at some fuel-system metals, and none of that clears away by itself. That is why it counts more. A test comes at the end: before that, fresh diesel goes in, and your filter is flushed or replaced if necessary. Then we fire it up and check it runs smoothly before leaving. Most jobs are finished in about half an hour after our technicians get there, as long as the motor has not run — and the pumps we use are safe on a busy forecourt yet quiet after dark beside a house. The insurer usually wants an engineer's report and the VAT invoice, and both are yours once this job is done. Payment is on the day, with no deposit. While we travel, have a look at your insurance documents; plenty carry cover for misfuelling. ## About Week Week is a small village in Devon, situated on the riverside at a low elevation of around 30 metres. Week lies near Shinners Bridge and Huxhams Cross Estate, within commuting distance of Plymouth, which is approximately 19 miles away. Week has a population of around 571 people, predominantly living in detached houses. ## AdBlue drains round Week, and Devon beyond Over TQ postcodes, our teams that cover Week — a village — work the surrounding locations too, Cott and Huxhams Cross Estate included. Quote a postcode that starts TQ9 6, and the van gets there quickest. Your car stays where it is. Draining takes place right there, be it a drive, a street by Dartington Cider Press, or a lay-by on the way to Beacon Copse. Guessing doesn't help at the back of Follaton Village Hall, close to a border, or anywhere awkward to pin down; phone and ask. ## In short, for Week motorists First, the cap; then, the tip. Even so AdBlue in the diesel tank? Petrol in Diesel can empty it wherever it stands, anywhere around Devon: keep the vehicle off then ring 0333 366 0103.