--- title: Carnsmerry: AdBlue in a Diesel Tank, What Next canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/carnsmerry-cornwall/ location: Carnsmerry county: Cornwall latitude: 50.392790 longitude: -4.794050 service: AdBlue in a Diesel Tank updated: 2026-10-07 --- # AdBlue in the Diesel Tank in Carnsmerry, and What to Do Next What to do about AdBlue in a diesel tank comes down to one thing more than any other: if your engine has been run since it was put in. Out in Molinnis or here in Carnsmerry, an unrun engine should remain that way. Ring 0333 366 0103 with the ignition and engine still off. In Carnsmerry, that is generally emptied and cleaned where it stands. If it's run, stop as soon as it is safe and switch off. The job is bigger, yet the first stage is the same. Below: the situations we see, wherever in Cornwall. Choose the one that fits. ## At the pump in Carnsmerry: AdBlue in a diesel You're at the pump, the nozzle or the bottle still in your hand, and you have just noticed the cap you opened was the wrong one. Anywhere in Carnsmerry, then — the nearest petrol station, Shell, or somewhere else nearby. In short: there is no better spot to be to spot it. Still in the tank, and nothing drawn onwards: that is where the AdBlue is. Freeing the pump is no excuse to run it — and so don't get back in. Ask the staff to help you roll the car into a parking spot, keep the receipt or the bottle, then ring us from the forecourt. If it cannot be moved, it can be cleared at the pump: the equipment is explosion-proof and fine on a busy forecourt. ## Carnsmerry, at home: AdBlue in the diesel tank On the dash, a warning had shown for days. You bought a bottle, poured it in on the drive, and only when you put the empty bottle in the recycling did you look once more at the cap. It occurs on drives just off Fore Street as regularly as anywhere. What it means: if you haven't driven since, this is nearly as good as the forecourt. Diesel and AdBlue stay apart: the AdBlue settles to the floor of your tank and stays there, however long it waits. Next: stop any early move by putting your keys in the house, then phone us. Bugle or Carnsmerry: whichever your driveway sits, that's where it is drained. The pumps are quiet enough to use outside a house after dark. ## On the road in Carnsmerry with AdBlue in a diesel Filled up, pulled away, and soon your motor was turning unevenly, smoking, losing power, or flashing up your dash. Maybe it was on Carnsmerry, maybe on the way out towards Truro, under 15 miles away. The upshot: the system has pulled AdBlue through by now. Through your filter, along the pipework, and — the further the mileage — deeper into the injection pump and every injector. Each mile and each restart takes it further. What to do: pull over where it is safe then switch off. Leave by the first junction — not the services beyond — if you're on the M5, over 50 miles from Carnsmerry. No test starts: clearing isn't something AdBlue will do. Ring us and say how far you went. ## AdBlue in the wrong tank: hire, lease and company vehicles You've had this vehicle barely a week. The AdBlue filler is right alongside the diesel one, which you did not know, because your own vehicle either has no AdBlue or keeps it somewhere else. Anyone, wherever across Cornwall, might make it. Meaning? Whatever case above applies here — run or not — plus one further stage. Any work on your car frequently needs the owner's approval under rental or company agreements. Next: phone the rental company or your fleet manager first, then us — sorting it before we arrive is quicker. If you're stuck in the car park at Bugle, or by Library of Things, whilst you wait for an answer, leave your car off. ## Not sure it was AdBlue in your diesel tank, Carnsmerry? "I think so" is often the most honest answer there is. Lighter, the bottle; a trace of ammonia round your filler; a hazy recollection of the cap. Look familiar? The gates of Bugle School in a rush, say, or someone's drive over in Rosevean. Meaning? Drips around the inlet don't reach your engine at all. Inside your diesel tank, by contrast, AdBlue damages it. Any AdBlue in that tank will be drawn in by turning on the vehicle, and the start wouldn't settle which it is in any case. Next: act as though it got in, then leave the engine off. Describe what you saw on your phone. A clear tank looked at is a better result than a run one drained. ## Every AdBlue drain in Carnsmerry shares these steps No matter the situation, one start is used. Our technicians come to your car, whether it is at a forecourt, a driveway, the car park outside The Bugle Inn or a side street near Crossroads Community Hall, and ask three things: what got in, about how much, and whether your motor has run. Those answers settle this work, and you get the quote on the phone, before anyone sets off. AdBlue crystallises and is corrosive to certain metals used in fuel systems, so it won't wash out on its own; that is why the flush, after the drain, matters much more here than with petrol. Your filter is flushed, or replaced where it needs to be; clean diesel goes in; and your car is tested. If the motor hasn't run, the majority of jobs take about half an hour once we're there. Lastly, our engineers start it. We make sure it runs smoothly on clean diesel before we leave. If it's spotted quickly, the vehicle very seldom has permanent damage, and the entire job happens where it is. Nothing is taken upfront, settlement is made on the day, and you get what the insurer asks for: an engineer report and a VAT invoice. Many policies include misfuelling, and so check yours as we head over. ## About Carnsmerry and where it is Carnsmerry is a small locality in inland Cornwall, situated approximately 163 metres above sea level. Carnsmerry lies within a short distance of several nearby settlements, including Bugle, Rosevear, and Gracca. Carnsmerry is characterised by its predominantly semi-detached housing stock and is located around 14 miles from the city of Truro. Carnsmerry is also relatively distant from London, at a distance of approximately 217 miles. ## AdBlue drains across Cornwall, Carnsmerry included As a small village, Carnsmerry shares its vans with the nearby places — Gracca, Rosevear — all the way across PL postcodes. A postcode starting PL26 8 is the quickest way to tell us where you are. Whether the car is on a lay-by on the way to Hensbarrow Downs or in a car park in the middle of Carnsmerry, it does not need to move. Draining happens on the spot. Ring and check instead of guessing if you are close to Bugle Methodist Church, near a boundary, or anywhere awkward to pin down. ## The one-line version Not run yet: keep the vehicle off then call. Already run: stop, switch off and ring. Either way, Petrol in Diesel takes it from there in Carnsmerry and anywhere in Cornwall on 0333 366 0103.