--- title: Roman Hill: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/roman-hill-suffolk/ location: Roman Hill county: Suffolk latitude: 52.478220 longitude: 1.749220 service: AdBlue in a Diesel Tank updated: 2026-10-21 --- # Why It Happens and How to Prevent It: AdBlue in a Diesel Tank in Roman Hill If AdBlue is already in your diesel tank, stop reading for a moment: leave your engine and the ignition off and phone 0333 366 0103. A drain plus a thorough flush, done just where the vehicle sits around Roman Hill, is normally all it takes if caught before your engine runs. Reading in advance? Then what follows explains why it happens and how to stop it ever happening. ## Why does AdBlue in a diesel car need its own filler? Diesel goes to the motor — but many modern diesels seen around Roman Hill and Kirkley carry another fluid as well. AdBlue goes to your exhaust, where it is sprayed into the gas to clean it, and it lives in a tank of its own. Each tank comes with one filler of its own. Other cars put the AdBlue filler in the boot or under the bonnet; a lot of others place both side by side behind one flap. The diesel side is fuelled at the petrol pump all the time. Far less commonly, the AdBlue side is filled — normally from a bottle, by a person thinking about where it goes. The mistake grows in the gap between the two. ## AdBlue in the diesel tank in Roman Hill: how it happens Rarely is it carelessness: normally three things line up. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out completely, the car goes into limp mode. So the top-up is done in a hurry: on a driveway off Camp Road before work, or in the car park at The Brewery Tap on the way home. Then, your hand goes for the cap it knew on the old car — because a hire car, a new motor or a company car places the fillers where your last one didn't. No part halts the pour once it has started, since a bottle with a spout goes into a diesel filler as easily as an AdBlue one. The bottle fits. Whether it takes place in Lowestoft or the middle of Roman Hill, it is the same few seconds. ## Which filler is for AdBlue, and which for diesel? Be it a Roman Hill forecourt or a driveway out in Oulton, take a couple of seconds over these before any is poured in. - Read the cap instead of going by where it sits: AdBlue ones are frequently blue or marked "AdBlue", and diesel caps normally are not. - On plenty of cars, size gives it away: AdBlue has the smaller filler neck. - Open the filler flap and check for a label — many cars mark what belongs in each inlet just there. - In your boot or under the bonnet: that's where your filler sits if it is not by your diesel cap, and the handbook says which. - The person who drove the car last. On a hire or company car picked up from somewhere like the car park outside Lowestoft, ask before you leave, not when the light comes on. ## AdBlue top-ups that never reach the diesel tank Anywhere around Suffolk the light comes on, here is a routine for the day. - Pull in on level, engine off, with time in hand — not hurried on the side of Raglan Street. - Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and read it. Daft, perhaps, yet it does the trick. - Leave the diesel cap on. If both sit under one flap, check your diesel cap is still closed before you lift the bottle. - Using the bottle's own spout, tip slowly — and stop when it's full or the bottle is empty. - Close the cap, then look once more — making sure the diesel filler stayed shut the whole time. After that, start the car. Find at the second or third step that AdBlue went into the diesel tank? That's where you stop. Leave out step five altogether. ## Already put AdBlue in your diesel tank around Roman Hill? Don't start your motor: that's how the short order of things begins. Do not switch the ignition on; on many diesels that alone runs the fuel pump. Topping up with diesel will not thin it: instead, AdBlue sinks to the bottom of that tank, just where fuel is taken from. Ask the staff to help push the vehicle clear of the pump if you're on a forecourt — the Esso, the Asda or somewhere else. Your own drive around Roman Hill is where it stays. Already run? Stop when it is safe, then switch off. Come off the M11 — over 50 miles out of Roman Hill — at the first junction. Distance matters — a quick hop across Roman Hill makes a smaller job than driving under 25 miles towards Norwich — so say roughly how far it went. ## What occurs when we turn up in Roman Hill Our technicians come to the vehicle wherever it has stopped, whether that is outside Roman Hill Primary School, near Lowestoft Library or on your own driveway. Our technicians ask what got in, about how much, and if it's run, since the answers settle the work and the quote. That quote comes over the phone, before any van leaves. Next: a drain, then a thorough flush of the whole system. With AdBlue that counts more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, and so it does not wash out on its own. A test is last: before that, clean diesel goes in, and your filter is cleaned or replaced as needed. Before leaving, our engineers fire it up and check that it's running correctly. Using pumps fine on a busy forecourt and quiet enough for use outside a house at night, most jobs in which your engine has not run take about half an hour after our technicians are there. Paying happens on the day, not upfront, and you receive the documents an insurer asks for: an engineer's report and a VAT invoice. Plenty of insurance policies include misfuelling cover, so it is worth checking yours while we are on the way. ## About Roman Hill Roman Hill is a suburban area in Suffolk, situated near the coast and close to the towns of Lowestoft and Great Yarmouth. Roman Hill sits at a low elevation of around 9 metres, looking out towards the North Sea. Roman Hill is characterized by its predominantly terraced housing and forms part of the larger urban area surrounding Norwich and Lowestoft. ## Roman Hill and Suffolk: AdBlue drains across the area Roman Hill is a residential suburb, and our teams that cover it also work the towns near it, Normanston and Gunton among them, across the NR postcode area. A postcode starting NR32 2 gets the van to you fastest. No need to move the car. Anywhere it stands — beside Our Lady Star of the Sea, in a layby heading to The Lowestoft Fountains, at home — that's where it gets drained. Ring and ask rather than guessing if you're near a boundary, or somewhere hard to describe, like the back of Kingdom Hall of Jehovah's Witnesses. ## Roman Hill people: the short version Read the cap before you tip. AdBlue in your diesel tank regardless? Leave the car off then phone 0333 366 0103; Petrol in Diesel drains it on the spot, across Suffolk.