--- title: AdBlue in a Diesel Tank Hyde Park Corner? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/hyde-park-corner-greater-london/ location: Hyde Park Corner county: Greater London latitude: 51.502210 longitude: -0.152010 service: AdBlue in a Diesel Tank updated: 2026-10-28 --- # Preventing AdBlue in a Diesel Tank in Hyde Park Corner: Why It Happens If AdBlue is already in your diesel tank, stop reading for a moment: leave your engine and your ignition off and phone 0333 366 0103. A drain plus a full flush, done right where the vehicle sits around Hyde Park Corner, is normally all it needs if found before the engine runs. The remainder of this page explains why it takes place and how to make sure it doesn't — useful if you're reading ahead of time. ## AdBlue in a diesel motor: two tanks, two fillers Diesel goes to the engine — yet plenty of modern diesels seen about Hyde Park Corner and Knightsbridge carry a second fluid too. Its own tank holds it, and from there it goes to the exhaust, where spraying cleans the gas. Separate tanks, different fillers. On a lot of cars the two sit side by side under the same flap; on others the AdBlue filler is in the boot or under the bonnet. Diesel goes in at each filling station visit, week in, week out. A driver who has to stop and work out where it goes normally tops up the AdBlue side, from a bottle, and far less often. That gap is where the error lives. ## How AdBlue in your diesel tank happens around Hyde Park Corner Carelessness rarely causes it. Instead is three things coming up at once. First, the warning. Low AdBlue triggers a warning from your car, and letting it run dry means limp mode — hence a hurried top-up, maybe before work off Grosvenor Crescent, perhaps outside The Grenadier on the way home that evening. Then the vehicle is new. A hire car, a new car or a company car puts the fillers where your last one did not, and the hand gets to for the cap it would have used on the old one. A spout-topped bottle meets no obstacle at a diesel filler no more than at an AdBlue one. And so the pour, once started, carries on. Belgravia or the middle of Hyde Park Corner: it takes the same few seconds in both. ## Telling the AdBlue filler from your diesel filler Before you pour anything, whether on a driveway in Brompton or a forecourt around Hyde Park Corner, check these. They take a couple of seconds. - Colour and lettering: an AdBlue cap is regularly blue, or says "AdBlue", where a diesel cap normally does not. Trust the cap, not where it sits. - Many vehicles fit AdBlue the smaller filler of the two. - The flap. Look inside the fuel flap for a label. Plenty of cars say there which fuel goes where. - The handbook shows where it is if the filler is not next to your 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 London Victoria. ## Topping up AdBlue without it reaching your diesel tank Anywhere in Greater London the light comes on, here is a routine for that day. - Not in a rush on the side of Grosvenor Place, not on a slope, not with your motor running: park then switch off first. - Locate the AdBlue filler, check the cap, and say the word "AdBlue" out loud while unscrewing it. It seems daft. It does the trick. - The two under one flap? So make sure the cap on the diesel filler is still closed before lifting the bottle. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Close the cap, then look once more — confirm the diesel cap stayed shut throughout. After that, start the vehicle. If at step two or three you find you have already poured into your diesel side, stop there. Skip step five altogether. ## Already put AdBlue in your diesel tank in Hyde Park Corner? What follows is a short order of things, starting with no starting the motor. Leave the ignition off as well, since on plenty of diesels switching it on alone starts the fuel pump. Filling up with diesel will not thin it: rather than mixing, AdBlue sinks to the bottom of the tank, just where the fuel is drawn from. If you are on a forecourt, whether it is the Esso or the Shell, ask the attendants to help push the car away from the pump. If you're on your own driveway in Hyde Park Corner, leave the vehicle where it sits. Stop as soon as it is safe and switch off, if the motor has already run. Come off the M4 — under 10 miles out of Hyde Park Corner — at the next exit. Mileage matters — a short hop across Hyde Park Corner is a smaller job than heading under 3 miles to Westminster — so tell us about how far it went. ## Hyde Park Corner: what occurs when our technicians get there Outside St George's Hanover Square CofE Primary School, close to Australia War Memorial or on your own drive: wherever the car has stopped, we come to it. Which liquid went in, the quantity, and whether it ran: our technicians ask because the replies set the work and price. You get that price by phone, before anyone heads out. Emptying that tank comes next, followed by a thorough flush of your system. With AdBlue that matters more than with petrol: it crystallises and is corrosive to some of the metals in a fuel system, so it doesn't wash out on its own. Testing comes at the end: before that, fresh diesel is added, and your filter is flushed or changed if necessary. Then our engineers fire it up and check it runs properly before leaving. Using pumps fine on a busy forecourt and quiet enough to use outside a house at night, most jobs in which the engine has not run take roughly half an hour after our engineers are there. The insurer usually wants an engineer's report and your VAT invoice, and both are yours at the end. Payment is on the day, with no deposit. Before we get there, have a look at your policy; many include cover for misfuelling. ## About Hyde Park Corner itself Hyde Park Corner is a suburban area in central London, situated on the southern edge of Hyde Park and overlooking the Serpentine Lake. Hyde Park Corner sits at a relatively low elevation of around 20 metres, close to the heart of the city. Hyde Park Corner is surrounded by other affluent neighbourhoods, including Belgravia, Mayfair, and St James's, and is home to a population of approximately 3610 people, predominantly residing in flats. ## AdBlue drains around Hyde Park Corner, and Greater London beyond Mayfair and St Jamess are among the towns near Hyde Park Corner, a residential suburb, that the same teams cover, throughout SW1X postcodes. A postcode starting SW1X 7 gets our van to you fastest. Moving the vehicle is not necessary. Anywhere it sits — near Royal Artillery Memorial, in a layby en route to The Rose Garden, at home — that's where it is cleared. Assuming doesn't help behind Wellington Monument, close to a boundary, or somewhere hard to pin down; phone and ask. ## Hyde Park Corner drivers: the short version Read the cap before you tip. Petrol in Diesel drains it where it stands, anywhere across Greater London, if AdBlue has gone in the diesel tank all the same — so leave it off then phone 0333 366 0103.