--- title: Explained: AdBlue in a Diesel Tank Harrowby canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/harrowby-lincolnshire/ location: Harrowby county: Lincolnshire latitude: 52.914730 longitude: -0.601520 service: AdBlue in a Diesel Tank updated: 2026-10-18 --- # Avoiding AdBlue in a Diesel Tank in Harrowby: Why It Occurs If AdBlue is already in your diesel tank, stop reading for a moment: leave your motor and your ignition off then call 0333 366 0103. Around Harrowby, catching it before the motor turns normally leaves a drain and a thorough flush where it stands. Here in advance? In that case the rest covers why it happens and what to prevent it happening at all. ## Why does AdBlue in a diesel vehicle need its own filler? No single fluid but two: that's how plenty of newer diesels near Harrowby and Manthorpe carry, with diesel for your motor. Your exhaust, not your engine, is where AdBlue goes: sprayed into the gas to clean it, from a separate tank. Separate tanks, different fillers. Some cars keep the AdBlue filler in the boot or under the bonnet; plenty of others have both together under one flap. Filling the diesel side at the pump happens all the time. Rarely filled, AdBlue usually goes in out of a bottle, poured by someone who must stop and think what filler it needs. It's in that gap that the mistake lives. ## AdBlue in the diesel tank in Harrowby: how it takes place It's hardly ever carelessness. Three things tend to line up. First, the warning. Low AdBlue triggers a message from your car, and running dry means limp mode — so a hurried top-up, maybe before work off Hall Lane, perhaps outside the pub in the village on the way home after work. The old car's filler is where the hand reaches — but a hire car, a new motor or a company car puts the fillers somewhere else. That is a second thing: a new vehicle. Nothing stops the pour after it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Whether it occurs in Cherry Orchard or the middle of Harrowby, it is the same few seconds. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a drive in Spittlegate or a forecourt around Harrowby, check these. They take a few seconds. - Check the cap rather than going by position: AdBlue ones are regularly blue or marked "AdBlue", and diesel ones usually aren't. - Check the size: the smaller filler neck is, on many cars, the AdBlue one. - Check inside your fuel flap: plenty of cars have a label there saying which fuel goes where. - The handbook says which it is when the filler is not next to your diesel cap: the boot, or under the bonnet. - The person who drove the car last. On a hire or company car collected from somewhere like the car park outside Grantham, ask before you leave, not when the light comes on. ## Keeping AdBlue out of your diesel tank when you top up When the light comes on, anywhere across Lincolnshire, use this routine. - Pull in on level, motor off, with time to spare — not rushing on the side of Harrowby Lane. - Locate the AdBlue filler, read the cap, and say the name "AdBlue" out loud while you unscrew it. It seems daft. It does the trick. - Both behind one flap? So make sure the cap on your diesel side is still shut before raising the bottle. - Using the bottle's own spout, pour slowly — and stop when it's full or the bottle is empty. - Shut the cap, and check once more — confirm your diesel filler stayed shut throughout. Only then, start your car. Spot at stage two or three that it has already gone into your diesel side? So stop right there. Stage five is out. ## AdBlue in the diesel tank already, around Harrowby? Short order, then. First: your motor stays unstarted. On many diesels your ignition alone runs the fuel pump, and so do not switch the vehicle on. Filling up with diesel will not dilute it: instead, AdBlue drops to the base of your tank, right where fuel is taken from. If you are at a forecourt, whether it is the BP or the Sainsbury's, ask the staff to help push the car away from the pump. On your own drive in Harrowby? Then the car stays put. If your motor has already run, stop as soon as it is safe and switch off. The next junction is where to leave when you are on the M1, under 50 miles from Harrowby. Mileage counts — a quick hop across Harrowby makes a smaller job than driving under 25 miles to Lincoln — so tell us about how far it went. ## Harrowby: what occurs when our engineers arrive Wherever your car has stopped, be it by Belmont Community Primary School, beside The Environcom Stadium (Harrowby United FC) or at home, the van travels to it. What fluid got in, the amount, and whether it ran: our engineers ask since those answers set both work and quote. You hear that quote by phone, before anybody heads out. Your system is then flushed thoroughly, once that tank is cleared. 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. Once your filter is cleaned — or replaced, where needed — fresh diesel goes in, and finally your vehicle gets tested. The motor is fired up next and checked to make sure it runs smoothly, all before our engineers go. With pumps safe on a working forecourt and quiet enough for use outside a house at night, most jobs where your motor has not run need about half an hour after our technicians are there. Paying is on the day, not upfront, and you receive the documents an insurer asks for: an engineer report and a VAT invoice. Misfuelling cover is part of plenty of insurance policies — and so make use of the wait to look at yours. ## About Harrowby Harrowby is a small locality in Lincolnshire, situated inland at an elevation of around 125 metres. Harrowby lies approximately 22 miles south of Lincoln and 99 miles north of London, near the villages of Cherry Orchard and Londonthorpe. Harrowby has a population of around 865 people, predominantly living in semi-detached housing. Harrowby is characterized by its quiet, residential atmosphere, with nearby Cold Harbour also part of the local community. ## AdBlue drains around Harrowby and across Lincolnshire Harrowby is a small village, and the teams that cover it also work the towns around it, Cold Harbour and Londonthorpe among them, across the NG postcode area. Give a postcode that starts NG31 9, and our van arrives quickest. The car stays where it is. Wherever it stands — beside The Church of the Ascension, on a lay-by en route to Hills and Hollows, on a drive — that is where it is cleared. Awkward to explain, like the back of Church Hall? By a border? Asking beats assuming, so phone. ## Harrowby people: the short version Before you pour, read the cap. Even so AdBlue in the diesel tank? Petrol in Diesel can empty it wherever it stands, anywhere across Lincolnshire: keep it off and phone 0333 366 0103.