--- title: What Now? AdBlue in a Diesel Tank Swavesey canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/swavesey-cambridgeshire/ location: Swavesey county: Cambridgeshire latitude: 52.301230 longitude: -0.004540 service: AdBlue in a Diesel Tank updated: 2026-10-22 --- # AdBlue in the Diesel Tank in Swavesey: What Now? One thing matters above all once AdBlue is in a diesel tank, and that is whether your engine has run afterwards. Not started yet? Then leave the vehicle like that, whether your car sits — Swavesey or Fen Drayton. Usually this is emptying and properly rinsing it on the spot in Swavesey — so keep the key and engine off then phone 0333 366 0103. Already run? Stop when safe, then switch it off. Step one stays the same, even though the work is bigger. Find the scenario below that matches yours, wherever in Cambridgeshire it happened. ## On a Swavesey forecourt with AdBlue in a diesel Imagine it: stood by the petrol pump, gripping the bottle, you realise the cap you opened was not the correct one. It might be the Shell, or the Morrisons, or another station around Swavesey. What it means: this is the ideal location to find out. The AdBlue is in the tank and nowhere else. Nothing has drawn it in. Clearing the petrol pump is no reason to run it — and so don't get back in. Get the attendants to help rolling it to a bay, save the bottle, then phone us from there. Stuck by the petrol pump? Explosion-proof kit keeps a busy forecourt safe, so it can be drained where it is. ## AdBlue in your diesel tank on a Swavesey drive? Several days had gone by with the warning light on. A bottle from the garage, tipped in on the drive — and it's just at the recycling that the cap caught a second look. Driveways close to Black Horse Lane get it as much as anywhere. Put simply: if the car hasn't been driven since, it is almost equal to finding out at the forecourt. Diesel and AdBlue keep separate: the AdBlue settles to the base of your tank and remains put, no matter how long it waits. Keep the keys indoors tonight — otherwise someone may take it away first thing — and phone us. In Boxworth End or right here around Swavesey, the draining is done on your driveway. The pumps are quiet enough to use outside a house at night. ## On the road in Swavesey with AdBlue in a diesel A mile or two after filling up, the motor started playing up: rough running, smoke, less power, lights on the dash. It might have been heading for Cambridge, under 10 miles away, or simply along Market Street. Put simply: the AdBlue has been sucked through your fuel system. Past the fuel filter, through the pipework, and — the further the distance — deeper into the high-pressure pump and every injector. Every restart, like each mile, pushes it on. Do this: pull up anywhere safe, then switch your engine off. Swavesey sits under 5 miles from the M11; there, come off at the next junction instead of pressing on for the services. No trial starts: clearing isn't something AdBlue does. Let us hear the mileage covered when you ring. ## Hire, lease or company car with AdBlue in the wrong tank You have just driven this vehicle a week. Your own car either has no AdBlue or keeps it somewhere different, so nothing told you the AdBlue cap was right next to the diesel. It can happen to anyone, anywhere in Cambridgeshire. The point: just as above, divided by if it ran, but with one added step. The owner frequently needs to sign off the work, under many rental and company agreements. Sorting it before we arrives is faster, and so phone the rental company or your fleet manager, then us. If you are stuck in the car park at Huntingdon, or by the centre, whilst you wait for an answer, leave the vehicle off. ## AdBlue in the diesel tank? Not sure, around Swavesey Honestly, the only answer may be that you think it did. A slight ammonia-like smell hangs near your filler, the bottle feels too light, and the cap you took off is hard to recall. A rushed top-up by the gates of Swavesey Primary School, or a visit to a friend in Holywell: both fit. What it means: a little spilled round the filler does no damage to the engine. In the diesel tank, however, AdBlue damages it. Any AdBlue in the tank would be drawn in by starting the car, and the start would not settle which it is in any case. Assume it was put in, and never turn the engine. Tell us what you noticed on your phone. A clear tank checked is a better result than a run one emptied. ## Swavesey: what every AdBlue drain has in common Whichever scenario you are in, this job starts the same way. Three questions are asked when we reach the car — at a forecourt, a driveway, a street beside St Andrew's or the car park at White Horse Inn: the fluid, the amount, and whether the motor has been started. Over the phone, before anything else, you are told the price, and those replies shape the work too. A thorough flush comes after this drain. With petrol it's standard; with AdBlue it is essential, because crystals form and certain metals corrode, and none of it rinses out unaided. Finally are the fuel filter, cleaned or replaced if necessary; clean diesel; and a test of the car. Most unrun vehicles are a half-hour job after the moment we arrive. Last, our engineers start the engine. Before we leave, it's checked to be sure it runs smoothly on fresh diesel. When it is noticed early, the vehicle very rarely has lasting damage, and the entire job happens where it is. Paying comes on the day, never upfront. For the insurer, you get a VAT invoice and a report from the engineer. Dig out your insurance before we're en route: cover for misfuelling comes included in many policies. ## About Swavesey itself Swavesey is a village in Cambridgeshire, situated near lakes and low-lying wetlands, with an elevation of around 10 metres. Swavesey lies approximately 8.5 miles from Cambridge and 55.1 miles from London, making it a commuter village with a mix of old and new housing, predominantly detached homes. Swavesey has a population of around 1314 people and is surrounded by smaller settlements like Boxworth End and Over End. ## AdBlue drains across Cambridgeshire, Swavesey included Over End and Over have the same teams as Swavesey, a village, along with other towns over CB postcodes. The location is quickest from a postcode that starts CB24 4. Stopped en route to Swavesey Memorial Garden, or right in the centre of Swavesey, your car stays where it is — there's no need to move it anywhere. The van drains it where it stands. Guessing doesn't help beside Swavesey Priory, close to a county line or anywhere hard to pin down; ring and ask. ## The one-line version If it has not started, phone and leave it that way. Whichever line applies, Petrol in Diesel takes over from there on 0333 366 0103, throughout Cambridgeshire and in Swavesey — once you pull over, turn off and ring, if it's run.