--- title: Southover: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/southover-east-sussex/ location: Southover county: East Sussex latitude: 50.869060 longitude: 0.005250 service: AdBlue in a Diesel Tank updated: 2026-10-01 --- # Avoiding AdBlue in a Diesel Tank in Southover: Why It Happens AdBlue already in the diesel tank? In that case set this page aside a moment, leave your ignition and motor off, and phone 0333 366 0103. Usually, if your motor has not run, it is drained and thoroughly cleaned where your vehicle is around Southover. Here in advance? Then the rest covers how it comes about and how to stop it happening at all. ## AdBlue in a diesel vehicle: two tanks, two fillers No single liquid but two: that's how plenty of modern diesels around Southover and Cliffe run, with diesel for your engine. AdBlue goes to the exhaust, where it is sprayed into the gas to fresh it, and it lives in a tank of its own. Every tank has a filler of its own. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in your boot or under the bonnet. The diesel side is fuelled at the petrol pump all the time. The AdBlue side is topped up far less frequently, usually from a bottle, and usually by a person who has to stop and think where it goes. The mistake lives in that gap. ## AdBlue in your diesel tank in Southover: how it takes place Seldom is it carelessness: normally three things coincide. Hurry follows from the warning. The vehicle tells you as AdBlue runs low, and a dry tank puts it into limp mode — so the top-up happens quickly, before work on a drive off Cockshut Road, or heading home in the car park at The King's Head. The old car's cap is where the hand reaches — yet a rental car, a new car or a company car puts the fillers somewhere else. That's the second factor: a new motor. A spouted bottle meets no obstacle at a diesel filler any more than at an AdBlue one. And so the pour, once started, keeps on. It's seconds, be it out in St Annes or right in the centre of Southover. ## The AdBlue filler and the diesel filler: telling them apart Whether a Southover forecourt or a driveway out in Cuilfail, spend a few seconds on these before anything goes in. - The cap. The AdBlue cap is regularly blue, or marked "AdBlue". The diesel cap usually isn't. Read it instead of going by position. - On many vehicles, size tells: AdBlue gets the smaller filler neck. - Check inside the fuel flap: many motors carry a label there saying which fuel goes where. - The handbook shows which it is if your filler isn't next to the diesel cap: your boot, or under the bonnet. - Check with the person who drove it last — before you leave, not when the light comes on — when you pick up a hire or company car from somewhere like the car park outside Lewes. ## Topping up AdBlue without it reaching the diesel tank When the light comes on, anywhere across East Sussex, follow this routine. - Stop on level, engine off, with time to spare — never hurried on the side of Cluny Street. - Find the AdBlue filler, check the cap, and speak the word "AdBlue" out loud as you unscrew it. It sounds daft. It works. - Both behind a single flap? So confirm the lid on the diesel side is still closed ahead of lifting the bottle. - Finish once your tank is topped up or the bottle is empty; before that, pour gently using its own spout. - Before you start your car, close the cap and look a second time that the diesel cap never opened off. Stop there if you find, at step two or three, that you have already poured into the diesel side. Do not go on to stage five. ## Put AdBlue in the diesel tank around Southover already? Don't start your motor: that is how the short order of things starts. Don't switch your ignition on; on plenty of diesels that alone runs the fuel pump. AdBlue doesn't mix with diesel — it sinks to the bottom of the tank, where the fuel is pulled from — so do not top up with diesel to dilute it. If you are at a forecourt, whether it's the Tesco or the BP, ask the staff to help push your car away from the pump. Your own driveway around Southover is where it should stay. Stop as soon as it is safe then switch off, if your engine has already run. Southover lies under 25 miles from the M23; on it, take the next junction. About how far did it go? Crossing Southover is less work than a trip of under 10 miles towards Brighton and Hove, so tell us. ## Southover: what occurs when we get there Wherever the car has stopped, whether outside Western Road Community Primary School, near Church End or on your own drive, the van travels to it. Both the work and the quote depend on three answers — what fluid, what amount, and if it's run — so our engineers ask. The price is given over the phone, ahead of any van leaving. Then your tank is emptied and your system purged thoroughly. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it doesn't wash out on its own. Testing comes at the end: before that, fresh diesel is added, and the fuel filter is flushed or changed if necessary. We don't go until it has been fired up and is running properly. With pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs in which the motor hasn't run take about half an hour after our technicians are there. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. It's worth checking your insurance as the van travels to you: misfuelling cover comes with many policies. ## About Southover, briefly Southover is a suburban area in East Sussex, situated on the banks of the River Ouse at an elevation of around 11 metres. Southover lies approximately 7 miles from the city of Brighton and Hove and about 45 miles from London. Southover is characterized by its predominantly terraced housing and is close to nearby places such as St Annes and Lewes. Southover has a population of around 4717 residents. ## AdBlue drains around Southover and across East Sussex Over BN postcodes, the teams that cover Southover — a residential suburb — work the surrounding places too, Wallands Park and Lewes included. Quickest of all: quote a BN7 1 postcode for the van. The car does not need to move. We drain it where it is — a side street close to Southover Church, a lay-by on the way to Southover and Western road sports field, a drive. Guessing won't help at the back of Anne of Cleves' House, close to a boundary, or anywhere hard to describe; ring and check. ## In short, for Southover drivers Read the cap before you tip. AdBlue in your diesel tank after all? Leave the car off then call 0333 366 0103; Petrol in Diesel empties it on the spot, throughout East Sussex.