--- title: Explained: AdBlue in a Diesel Tank St Michaels canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/st-michaels-kent/ location: St Michaels county: Kent latitude: 51.085640 longitude: 0.695930 service: AdBlue in a Diesel Tank updated: 2026-10-25 --- # St Michaels: How Does AdBlue End Up in a Diesel Tank, and How Do You Prevent It? Stop here for a moment if the diesel tank already has AdBlue in it: ignition off, engine off, and phone 0333 366 0103. A drain and a thorough flush, done just where your vehicle sits around St Michaels, is usually what it takes if caught before the motor runs. If you're reading before it has happened, the rest of this page is about why it takes place and how to make sure it does not. ## Why does AdBlue in a diesel car need its own filler? Not one fluid but two: that is how plenty of modern diesels around St Michaels and High Halden carry, with diesel for the engine. Kept in a tank of its own, AdBlue is fed into your exhaust stream and cleans it. There's a filler on each tank. Under one flap, next to each other: that's the layout on a lot of cars. Elsewhere, AdBlue's filler sits beneath the bonnet or in your boot instead. At the pump, your diesel side is topped up all the time. A driver who has to stop and work out where it goes usually fills the AdBlue side, from a bottle, and much less regularly. It's in the gap that the mistake happens. ## AdBlue in the diesel tank in St Michaels: how it happens Carelessness seldom explains it. What does is three things coming up together. The warning comes first. As AdBlue runs low the car tells you, and if it runs out altogether, the vehicle goes into limp mode. So the top-up is done in a hurry: on a drive off Ox Lane before work, or in the car park outside The Crown on the way home. Unfamiliar cars come next, too. Hire cars, new vehicles and company vehicles place their fillers in new places, and habit goes for the cap used on the old one. A spouted bottle meets no obstacle at a diesel filler any more than at an AdBlue one. So the pour, after started, keeps on. The same few seconds decide it, in the middle of St Michaels or out in London Beach. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a drive in Leigh Green or a forecourt in St Michaels, check these. They take a few seconds. - Blue and lettering: an AdBlue cap is frequently blue, or says "AdBlue", where a diesel cap normally does not. Go by the cap, not where it sits. - Check the size: the smaller neck is, on many motors, the AdBlue one. - Look inside your fuel flap: plenty of motors have a label there showing which fuel goes where. - The handbook says which it lives when the filler isn't next to your diesel cap: the boot, or under the bonnet. - The person who drove the vehicle last. On a hire or company car collected from somewhere like the car park outside Pluckley, ask before you leave, not when the light comes on. ## Topping up AdBlue without it reaching the diesel tank Wherever across Kent the light comes on, here is a routine for that day. - Park and switch off. Not on a slope, not with the engine running, and not in a rush on the side of Heather Drive. - Find the AdBlue filler, check the cap, and speak the word "AdBlue" out loud as unscrewing it. It seems silly. It does the trick. - If both sit under one flap, check your diesel cap is still closed before you lift the bottle — then leave the car on. - Using the bottle's own spout, tip slowly — and stop when it's full or the bottle is empty. - Before starting your car, shut the cap and check again that your diesel cap was never came off. Spot at step two or three that it has already gone into the diesel side? So stop just there. Skip stage five entirely. ## Put AdBlue in your diesel tank in St Michaels already? Brief list, then. Top of that: the engine remains unstarted. On many diesels the ignition alone runs the fuel pump, and so don't switch the car on. Don't top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of your tank, where your fuel is drawn from. If you are on a forecourt, whether it is the Esso or the BP, ask the attendants to help push the car away from the petrol pump. Leave it where it is if you are on your own driveway around St Michaels. Where your motor has run already, stop safely and turn it off. Leave the M20 — under 10 miles out of St Michaels — at the first exit. Tell us roughly how far it went: a run towards Canterbury, under 25 miles away, is a bigger job than a short hop across St Michaels. ## When our technicians turn up in St Michaels, what occurs? Outside St Michael's Church of England Primary School, close to St Michael or on your own drive: wherever the car has stopped, our engineers come to it. The replies determine the work and the quote, so we ask what was put in, roughly how much, and whether it's run. That price comes on the call, before any van leaves. Then your tank is drained and your system purged thoroughly. More than with petrol, it counts with AdBlue: crystals build up, certain metals are attacked, and nothing washes out on its own, no matter how long it is left. A test is at the end: before that, fresh diesel goes in, and the filter is flushed or replaced if necessary. The motor is fired up next and checked to confirm it runs correctly, all before our technicians leave. Most jobs are done in roughly half an hour once our engineers get there, provided your motor hasn't run — and the pumps our technicians use are safe on a busy forecourt and quiet after dark outside a house. The insurer usually wants the engineer's report and your VAT invoice, and both are yours once this job is done. Payment is on the day, with no deposit. It is worth checking your policy as the van travels to you: misfuelling cover comes with many policies. ## About St Michaels St Michaels is a suburban area in Kent, situated inland at an elevation of 56 metres, and is located approximately 46 miles from London. St Michaels is characterized by its predominantly detached housing stock, and is close to nearby places such as London Beach and Tenterden. St Michaels sits within the wider commuter belt of South East England, with the city of Canterbury being the nearest major urban centre, about 21 miles away. ## AdBlue drains around St Michaels and across Kent As a residential suburb, St Michaels shares its vans surrounding places — Durrant Green, Tenterden — all the way across TN postcodes and the wider area around them. Give a postcode beginning TN30 6, and the van arrives quickest. Your car remains put. Anywhere it stands — near Trinity Baptist Church, on a lay-by en route to St Michaels Football Pitch, at home — that's where it gets drained. Guessing won't help behind Saint Andrew's Catholic Church, on a boundary, or somewhere hard to pin down; ring and check. ## In short, for St Michaels motorists Always, the cap; after that, the pour. If AdBlue has gone in the diesel tank anyway, leave the vehicle off and call 0333 366 0103. Petrol in Diesel drains it where it sits, anywhere around Kent.