--- title: AdBlue in a Diesel Tank Crowlas: What Now canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/crowlas-cornwall/ location: Crowlas county: Cornwall latitude: 50.146480 longitude: -5.478340 service: AdBlue in a Diesel Tank updated: 2026-10-13 --- # AdBlue in the Diesel Tank in Crowlas: What Now? Has the engine run since the AdBlue was put in? That single question decides nearly everything about what comes next. If it has not, keep it that way, whether the car is around Crowlas itself or out in Nanceddan. Leave the engine and the ignition off and ring 0333 366 0103; it's normally a drain and a thorough flush, done where your car is around Crowlas. Already run? Stop when you safely can, then switch it off. It's a bigger job, yet step one doesn't change. Compare what happened to one of the ones below, anywhere across Cornwall you are. ## AdBlue in a diesel on a Crowlas forecourt You are at the petrol pump, the nozzle or the bottle still in your hand, and you have just noticed the cap you opened was the wrong one. It might be the Morrisons, or the Sainsbury's, or a different station around Crowlas. Meaning? Spotting it here is as good as it gets. Still in your tank, and no fuel pulled onwards: that is where the AdBlue is. What to do: do not get back in and crank it to clear the pump. Ring us from the forecourt once your car is in a bay — the attendants will lend a hand to roll it — then save the receipt. Stuck by the pump? Our explosion-proof kit keeps a live forecourt sensible, and so it can be drained where it is. ## Crowlas, at home: AdBlue in the diesel tank On the dash, a reminder had been lit all week. A bottle from the garage, emptied in at the driveway — and it was just at the recycling that the cap got a second look. Drives close to Chapel Square see it as much as anywhere. The upshot: no driving since leaves it almost as good to spotting it at the petrol pump. Being reluctant to mix, AdBlue drops low in that tank and waits. One night parked changes nothing. Your move: keys in the house, and so no one takes your car anywhere first thing. After that, phone. Vellanoweth or Crowlas: wherever your driveway is, that's where it gets drained. Night-time empties beside a house are fine: the pumps are low-noise. ## Drove off with AdBlue in a diesel around Crowlas? Topped up, drove away, and before long the motor was running roughly, blowing smoke, losing power, or flashing up the dash. Maybe driving to Truro, under 25 miles away, or just along Rospeath Industrial Estate. In short: the AdBlue has been pulled into your fuel system. Mileage decides how far it goes: filter and pipework to begin with, then the high-pressure pump and every injector. Each mile and each restart takes it further. Stop somewhere safe — that's the first job — then switch everything off. Crowlas sits over 50 miles from the M5; there, come off at the first junction instead of pushing on to the services. Restarting it to test gets nothing — AdBlue never clears on its own. Roughly how far had it gone? Tell us as you phone. ## Hire, lease or company car with AdBlue in the wrong tank A week back, the car was new to you. Your own motor either does without AdBlue or puts it elsewhere, and so no one told you the AdBlue inlet was just next to your diesel. Anyone, anywhere around Cornwall, might make the same. Put simply: an extra step on top of the situations above, which depend on whether it's run. Plenty of hire and company contracts want the owner to approve work on the vehicle. Next: ring the hire company or your fleet manager first, and then us — settling it before we arrive is faster. If you are stranded in the car park at St Erth, or by Ludgvan Village Hall, while you wait for an answer, leave your car off. ## Not sure it was AdBlue in the diesel tank, Crowlas? "I think so" is often as honest answer there is. What cap came off, you can't recall; but the bottle weighs lighter than expected, and ammonia lingers by the filler. Possibly it happened in a hurry at the school gates at Ludgvan School, or on a friend's drive in Ludgvan. In short: a spill round your filler leaves your motor unharmed. AdBlue inside your diesel tank does. You cannot tell which by turning the key, and doing so would draw in any AdBlue that is in that tank. Next: assume it got in, then keep the motor off. Phone and give what you saw: we would sooner find a tank free of AdBlue than drain one once the motor has run. ## Each AdBlue drain around Crowlas shares these steps Whichever situation you are in, this job starts the same way. Our technicians come to your car, whether it is at a forecourt, a driveway, the car park at The Star Inn or a side street near St Paul, and ask three things: what got in, roughly how much, and if your engine has been run. Over the phone, before anything else, you are told our price, and those answers shape the job too. Emptying the tank comes next, then a careful flush — more important with urea than after petrol, since crystals and corrosion won't clear on their own, no matter how long it sits. Your filter is flushed, or replaced where it needs to be; clean diesel goes in; and your car is tested. If the engine hasn't run, most jobs take about half an hour once we're there. The final step is starting the engine. Before our technicians go, it is tested to make sure it runs correctly on clean diesel. Lasting damage is very rare if it is spotted early, and the whole job is done where your car is. Nothing is taken upfront, payment happens on the day, and you get what your insurer asks for: an engineer report and a VAT invoice. Plenty of insurance policies include misfuelling cover, so it is worth checking yours while we're on the way. ## About Crowlas Crowlas is a small coastal village in Cornwall, situated near the towns of Vellanoweth and Cockwells, with Truthwall also nearby. Crowlas sits at a low elevation of around 19 metres, close to the sea in the south-west of England. Crowlas has a population of approximately 1054 people, living mostly in detached houses. Crowlas is located about 20 miles from Truro, the nearest city, and around 252 miles from London. ## AdBlue drains around Crowlas and across Cornwall As a coastal village, Crowlas shares its vans with the nearby places — Truthwall, Cockwells — right through TR postcodes. A postcode starting TR20 8 is the quickest way to tell us where you are. Centre of Crowlas or a lay-by towards Truthwall Wood: wherever it sits, your vehicle never needs to move an inch for this drain. Where it stands, that's where it is cleared. Assuming won't help beside Aqua Obscura, on a county line or somewhere hard to describe; phone and check. ## The one-line version If it has not run, ring then leave it off. Already run: stop, switch off and ring. Either way, Petrol in Diesel takes it from there in Crowlas and anywhere across Cornwall on 0333 366 0103.