--- title: Longlevens: AdBlue in a Diesel Tank? Don't Start canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/longlevens-gloucestershire/ location: Longlevens county: Gloucestershire latitude: 51.877920 longitude: -2.217080 service: AdBlue in a Diesel Tank updated: 2026-10-25 --- # Longlevens: AdBlue in the Diesel Tank? Leave It Off If AdBlue has gone into your diesel tank, keep your engine off then leave the ignition off. Urea mixed in water is all AdBlue is. Being water-based, it will not ignite and won't blend with diesel; trouble only starts when your pump begins pulling it. In Longlevens, AdBlue in a diesel tank found before your engine runs usually comes down to a drain and a thorough flush, right where the car is. Before you do anything else, call 0333 366 0103. ## What to do straight away, Longlevens: AdBlue in the diesel tank Do: - Take the keys out, and so no one switches your ignition on. - Near moving traffic? So put the hazards on. - The empty bottle or your receipt shows us the product and the quantity, and so do not bin it away. - Call just where you are. Quote a GL2 0 postcode or the nearest street name, and nobody has to hunt for you. Things not to do: - Don't start your engine, even for a moment to shift the vehicle. - Switching your key to ignition alone starts your pump running on plenty of diesels. Skip it. - Pouring in extra diesel doesn't help: AdBlue separates out rather than thinning. - Any driving at all is to be avoided, even a short stretch along Longford Lane. - By the road, do not try draining it on your own. Ask the people behind the counter to help you roll the car away from the island if you are on a forecourt in Longlevens, whether it is the Esso or somewhere else. If you're on your own drive, leave the car just where it stands. ## What does AdBlue do in a diesel tank? Meant for the exhaust, AdBlue has no place in the motor. Its own tank keeps it, and from there it's sprayed into the exhaust, and there it treats the gas. Nothing in it is supposed to pass through a fuel pump, and nothing in a fuel pump is made to handle it. Fuel mixes; AdBlue, once tipped in, won't. The behaviour is not at all like fuel's. Heavier than diesel, it sinks and collects below it — the same spot the intake draws from. A car topped up on a driveway in Kingsholm overnight and left unstarted is the straightforward case. Nothing has sucked the AdBlue up so far — but when your motor runs, that is what goes first, straight from the bottom of that tank. Two kinds of damage come from there. As its water goes, the urea left behind crystallises, and the crystals block filters and settle in fine passages. And it's corrosive to some of the metals a fuel system is made from, and so it keeps labouring on the parts it hits for as long as it remains there. Lines holding AdBlue mean harm overnight for a vehicle sitting around Longlevens. Just inside that tank, it stays stable. And there is the water: it offers no protection to the components that need it most — the high-pressure pump and every injector. ## Why AdBlue in a diesel is regularly more serious than petrol An issue of thin fuel is what you get after fuelling a diesel with petrol at the Valero. No harm comes while it stays unused, mixed into the diesel — only when the engine runs on it. AdBlue in a diesel is an issue of the wrong substance altogether. It doesn't burn, so it cannot simply be run through. Deposits and corrosion stay after the following fill, and AdBlue splits back out of your diesel, and so thinning it can't work. That is why the flush counts more, and turning your key "to see" costs more here than nearly any other slip — in Barnwood or the centre of Longlevens equally. The good news is the same as with petrol. Clearing a tank is the simplest job on any fuel system, and with no running, the AdBlue remains in it — wherever around Gloucestershire the car has stopped. ## AdBlue in a diesel tank around Longlevens: how it ends up there No one means to do it. The AdBlue filler on many motors sits right next to your diesel filler, sometimes under the same flap, and the two caps can look alike in poor light. Mostly it takes place with a bottle bought on the way home and poured in on the drive, not at the pump. It tends to take place in a couple of familiar ways. A warning light comes on during the school run, and the top-up happens in a hurry outside Longlevens Junior School. After work, a container goes in on a drive near Oxstalls Lane. Or the vehicle is topped up in the car park at Glevum Inn, in poor light, by a person who has never opened that flap before. Rented cars, brand-new motors, fleet vehicles, or the second car in a family with both fuels: the least familiar cars see it most. Anywhere around Gloucestershire, Longlevens as well, the mistake doesn't change, and nor does the first response: keep it switched off. ## Longlevens: started the engine with AdBlue in your diesel tank? Then the AdBlue has left the tank. It has been drawn through your filter and the lines, and if your engine ran for any time, it has got to the high-pressure pump and the fuel injectors. You may notice your motor running unevenly, smoking, losing power, showing warning lights or cutting out, perhaps on the way back from Meadow View or halfway across Longlevens. When you safely can, stop then turn everything off — without restarting to test. More of that is pulled through with each start. On the M5, under 3 miles from Longlevens, the next junction is where to exit, and anywhere safe is where to park — not driving on. How far it went counts. A few hundred yards across Longlevens to the car park by Longlevens Library is a very different job from a run towards Gloucester, under 3 miles away, with the AdBlue reaching further into the fuel system with every mile. Tell us about how far it had come. Our engineers do all of the rinsing where the vehicle has stopped, and once your engine has run there is more of it. Long-term damage is very uncommon when it's spotted soon. ## What clearing AdBlue from a diesel involves in Longlevens The vehicle remains where it is, whether that is a road near Longlevens Community Centre, a drive, a layby or a forecourt in Longlevens, and the van travels to it. What went in, about the quantity, plus if the motor has turned over: we check first, because those decide the work. On the spot, that tank is then drained, and both the polluted diesel and the urea come out at once. What remains from AdBlue won't flush away unaided, and so the whole system gets a full flush, which matters much more with urea than with petrol. Testing your car follows last, after fresh diesel goes in and the fuel filter gets flushed or, where necessary, swapped. If the engine has not run, most jobs take about half an hour once our engineers are there. Our pumping gear is explosion-proof, so a live forecourt is no issue, and it is quiet enough for a residential street late at night. Clean diesel goes in to prime your system, and that is the last step. Firing it up comes next, and then you set off from where your car is parked, outside Gloucester or on a driveway in Longlevens. Our engineers make sure it runs smoothly on new diesel before we go. As the job is done in its entirety where your car is, a garage never comes into it. Insurers ask for a VAT invoice and an engineer report, and you get both at the end. ## About Longlevens, briefly Longlevens is a suburban area located on the outskirts of Gloucester, situated near the River Severn in Gloucestershire. Longlevens sits at an elevation of 19 metres, with its riverside setting influencing the local environment. Longlevens is characterized by its predominantly semi-detached housing stock, which reflects the area's residential development. Longlevens is close to nearby places such as Elmbridge, Wotton, and Longford, and is approximately 1.6 miles from Gloucester city centre. ## AdBlue drains across Longlevens and Gloucestershire AdBlue jobs in Longlevens go to teams that cover the towns around it — Elmbridge, Wotton as well as Longford — and much of Gloucestershire beyond, throughout GL postcodes. Assuming won't help close to a county line or anywhere tricky to describe; phone and check. No towing is needed. In Longlevens, a residential suburb, a mobile service fits: your car is drained where it stands, whether in a driveway, a residential street, a parking area or a filling station. ## What does AdBlue in a diesel tank cost to sort out in Longlevens? There's no fair single quote, since the jobs aren't the same. What changes the price is, firstly, whether the engine has run and for how long; then how much AdBlue got in; and then where your car is and whether our van can get to it safely, which is simpler on an open drive than in a tight gap behind Longlevens Village Hall. That's why each call from Longlevens starts with the same three questions, asked before giving a figure, not after: what went in, how much, and whether it's run. Once those are answered, a range turns into a single firm number. Our price is quoted on the call, before anyone sets off; payment comes on the day, by card or over the phone, and nothing upfront. Many insurance policies include misfuelling cover, so it is worth checking yours while we are on the way. ## In Longlevens and still next to the vehicle? Leaving the vehicle alone is, then, the most useful move open to you. Engine off, keys out, ignition off. Petrol in Diesel takes over the remainder, across Longlevens or wherever within Gloucestershire, once you phone 0333 366 0103 to say it's AdBlue, about how big an amount, and whether it ran.