--- title: AdBlue in a Diesel Tank St Anthonys Hill: Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/st-anthonys-hill-east-sussex/ location: St Anthonys Hill county: East Sussex latitude: 50.790590 longitude: 0.310190 service: AdBlue in a Diesel Tank updated: 2026-10-07 --- # Avoiding AdBlue in a Diesel Tank in St Anthonys Hill: Why It Occurs AdBlue already in your diesel tank? Then put this page aside a moment, keep your ignition and motor off, and ring 0333 366 0103. Around St Anthonys Hill, catching it before the motor runs normally means draining and a full flush on the spot. If you're reading before it has happened, the rest of this page is about why it occurs and how to make sure it doesn't. ## Why does AdBlue in a diesel vehicle need its own filler? Diesel goes to your motor — yet plenty of current diesels driven about St Anthonys Hill and Crumbles hold another fluid as well. The exhaust, not the engine, is where AdBlue goes: sprayed into the gas to fresh it, from a separate tank. Each tank has its own filler. On a lot of motors the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. Diesel gets filled at every filling station call-out, again and again. Much less regularly, the AdBlue side is topped up — normally from a bottle, by a person working out where it goes. The error lives in that gap. ## How AdBlue in your diesel tank takes place in St Anthonys Hill Rarely is it carelessness: normally three things line up. The warning comes first. As AdBlue runs low the car tells you, and if it runs out completely, the vehicle drops into limp mode. So the top-up is done in a hurry: on a driveway off Seaville Drive before work, or in the car park at The Alexandra Arms on the way home. Then the car is strange. A hire car, a new vehicle or a company car puts the fillers where your last one did not, and the hand reaches for the cap it would have used on the old one. Lastly, the spout goes in: a diesel filler or AdBlue filler, it slides in as readily, and once the pour begins, no part stops it. Whether it happens in Langney Village or the middle of St Anthonys Hill, it's the same few seconds. ## Telling the AdBlue filler from your diesel filler Before you pour anything, whether on a driveway in Friday Street or a forecourt around St Anthonys Hill, check these. They take a couple of seconds. - The cap. The AdBlue cap is frequently blue, or marked "AdBlue". Your diesel cap usually is not. Read it instead of going by position. - On many vehicles, the size tells: AdBlue has the smaller filler neck. - A label inside your fuel flap often says which fuel goes where, on many cars. Check for it. - In the boot or under the bonnet: that's where the filler sits if it's not by your diesel cap, and the handbook tells you which. - The person who drove the vehicle last. On a hire or company car collected from somewhere like the car park outside Hampden Park, ask before you leave, not when the light comes on. ## AdBlue top-ups that never reach your diesel tank For the day the warning appears — anywhere you are in East Sussex — a simple routine to follow. - Turn off after you park — flat ground, engine off, and not in a rush by The Circus on the verge. - Say "AdBlue" out loud as you unscrew the cap, after you find the AdBlue filler and reading it. Silly, yes, but it does the trick. - The two under a single flap? Then make sure the cap on the diesel side is still shut ahead of lifting the bottle. - Gently is best, through the bottle's own spout, till it's full or the bottle runs out. - Close the cap and check again. Make sure the diesel cap was never opened. Only then start the car. Find during the second or third step that AdBlue went in the wrong filler? That's where you stop. Don't go on to step five. ## Put AdBlue in the diesel tank in St Anthonys Hill already? Do not start the motor: that is how the short order of things starts. Leave the ignition off too, since on plenty of diesels switching it on alone runs the fuel pump. Do not top up with diesel to thin it: AdBlue doesn't mix with diesel, it sinks to the bottom of your tank, where the fuel is sucked from. The attendants at Tesco, Asda or any forecourt will usually lend a hand pushing the vehicle clear if asked. If you are on your own drive around St Anthonys Hill, leave the car where it stands. Stop as soon as it is safe and switch off, if the engine has already run. St Anthonys Hill sits under 50 miles from the M23; there, take the next junction. A short hop across St Anthonys Hill is a smaller job than a run towards Brighton and Hove, under 25 miles away, and so tell us roughly how far it went. ## St Anthonys Hill: what takes place when our technicians get there The van comes to the vehicle anywhere it has come to rest — your own drive, beside Catholic Church Christ the King, or outside Tollgate Community Junior School. Which liquid got in, the amount, and whether it ran: our technicians ask since the answers decide both work and quote. On the call itself, you are told the quote — ahead of dispatch. Then your tank is drained and your system rinsed thoroughly. Much more than with petrol, it counts with AdBlue: the crystals build up, certain metals are attacked, and none of it clears away on its own, however long it sits. Testing comes at the end: before that, clean diesel goes in, and the filter is flushed or changed as needed. Before we leave, we start the engine and confirm that it's running properly. Most jobs are finished in about half an hour once our technicians get there, as long as your motor hasn't run — and the pumps our engineers use are fine on a live forecourt yet quiet at night outside a house. No money upfront; you settle up that day. Afterwards, the VAT invoice and a report from the engineer go to you for your insurer. While we travel, have a look at your insurance documents; many include cover for misfuelling. ## About St Anthonys Hill itself St Anthonys Hill is a suburban area in East Sussex, situated near the coast and approximately 19.9 miles from Brighton and Hove. St Anthonys Hill has a relatively low elevation of around 7 metres, and its proximity to the sea has influenced its development. St Anthonys Hill is characterised by its predominantly semi-detached housing stock, which is typical of many suburban areas in the South East of England. ## AdBlue drains round St Anthonys Hill, and East Sussex beyond St Anthonys Hill is a residential suburb, and the vans that cover it also work the towns around it, Langney and Roselands among them, across the BN postcode area. A postcode starting BN23 6 gets our van to you fastest. The car does not need to shift. Wherever it sits — beside Conqueror Hall, on a layby heading to Five Acre Field, at home — that is where it gets drained. Assuming won't help at the back of Saint Richard, close to a boundary, or somewhere hard to pin down; ring and ask. ## St Anthonys Hill people: the short version Read the cap before you tip. AdBlue in the diesel tank after all? Leave the vehicle off then ring 0333 366 0103; Petrol in Diesel drains it where it stands, throughout East Sussex.