--- title: AdBlue in a Diesel Tank Higher Boscaswell: What Now canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/higher-boscaswell-cornwall/ location: Higher Boscaswell county: Cornwall latitude: 50.151740 longitude: -5.664580 service: AdBlue in a Diesel Tank updated: 2026-10-16 --- # AdBlue in the Diesel Tank in Higher Boscaswell: What Now? One thing matters most when AdBlue is in a diesel tank, and that is whether the engine has been started afterwards. Out in Trewellard or right in Higher Boscaswell, an unstarted motor should remain that way. Usually this means emptying and properly rinsing it on the spot around Higher Boscaswell — so leave the key and engine off then ring 0333 366 0103. Stop the minute it is safe then turn off, if it has been run. The job is bigger, but the first step is the same. Compare your case to one of the list below, anywhere in Cornwall you happen to be. ## At the pump in Higher Boscaswell: AdBlue in a diesel The cap you opened was the wrong one — and you only notice it as you're standing at the pump, bottle or nozzle in hand. It could be the Trewellard Garage, or the another forecourt nearby, or another forecourt around Higher Boscaswell. What it means: this is the ideal location to find out. Still inside that tank, with no fuel drawn onwards: that is where the AdBlue sits. Do this: stay out of the car, however much the queue wants freeing. A few things: a shove into a space with the staff helping, the bottle kept, and a ring to us from where you stand. Draining it there at the petrol pump is fine if it cannot be shifted, since the equipment is explosion-proof. ## Higher Boscaswell, at home: AdBlue in your diesel tank The warning light had been on 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 takes place on driveways just off B3306 as commonly as anywhere. The point: zero driving since makes this nearly equal to spotting it at the pump. Diesel and AdBlue keep separate: the AdBlue settles to the floor of the tank and stays there, no matter how long it waits. Next: keys in the house, so nobody drives the car off first thing. After that, phone. Out in Pendeen or right here around Higher Boscaswell, the drain happens at your drive. Even at night, the pumps stay quiet enough for a driveway. ## On the road in Higher Boscaswell with AdBlue in a diesel Rough running, smoke, falling power or a lit dashboard started a short way after the top-up. Anywhere on Boscaswell Road or heading to Truro — under 50 miles away. What it means: the system has pulled the AdBlue in. Distance decides how far it goes: filter and lines to begin with, then the injection pump and every injector. It travels further with each extra mile covered and each restart. What to do: pull over where it's safe to do so then switch off. On the M5, over 50 miles from Higher Boscaswell, that means the next exit, not the services further on. No test starts: clearing isn't something AdBlue does. Tell us know the mileage driven when you ring. ## AdBlue in the wrong tank: hire, lease and company motors You have had this vehicle barely a week. Your own motor either does without AdBlue or puts it elsewhere, and so no one told you the AdBlue cap sits just beside the diesel. Any driver, anywhere in Cornwall, could make the same. The upshot: exactly as above, split by whether it ran, but with an added stage. Plenty of hire and company contracts want the owner to approve work on the car. Sorting it before the van arrives is quicker, and so phone the hire company or your fleet manager, and then us. Stuck by Pendeen Parish Hall and Theatre or outside Penzance till someone replies, your vehicle remains switched off the whole time. ## Higher Boscaswell: unsure if it was AdBlue in your diesel tank? Honestly, the only answer may be that you think so. The bottle is lighter than it should be, there is a faint smell of ammonia round the filler, and you cannot remember which cap you took off. The gates of Pendeen School in a rush, say, or someone's driveway out in Higher Bojewyan. What it means: a little spilled about the filler does no damage to your engine. Once it's inside the diesel tank, though, it does. Firing up the car won't tell you which, and if there is AdBlue in that tank it will draw it in. Do this: behave as if it did, and don't start the engine. Checking a tank that turns out clean is better than draining one after it's been run — so phone and describe to us what you saw. ## The common ground in each Higher Boscaswell AdBlue drain The job begins the same way, whichever the situation. Forecourt, drive, The North Inn's car park or a road by St John the Baptist — our van comes to your car, and three answers come next: what fluid, what quantity, and if it has run. On the phone, before anything else, you are told the quote, and those replies shape the work too. Then that tank is cleared and your system cleaned thoroughly, which counts more with AdBlue than with petrol: AdBlue crystallises and is corrosive to some of the metals in a fuel system, and so it does not rinse out on its own. Your filter is flushed, or replaced where it needs to be; fresh diesel goes in; and the car is tested. Most unrun vehicles are a half-hour job after the moment our engineers get there. Starting the car comes at the end. Our test that it runs smoothly on fresh diesel comes before our technicians leave. We do the whole job where your car is, and long-term damage is very uncommon when it has been noticed soon. Nothing is paid upfront, settlement happens on the day, and you receive what the insurer asks for: an engineer report plus a VAT invoice. Plenty of insurance policies include misfuelling, and so check yours while the van travels. ## About Higher Boscaswell, for a moment Higher Boscaswell is a small suburban area situated on the north coast of Cornwall, with nearby villages including Pendeen and Lower Boscaswell. Higher Boscaswell sits at an elevation of around 130 metres, overlooking the coastal scenery of the area. Higher Boscaswell has a mix of housing types, but terraced homes are particularly prevalent in the area. Higher Boscaswell is located approximately 28 miles from the city of Truro, and about 259 miles from London. ## AdBlue drains around Higher Boscaswell, and across Cornwall too Lower Boscaswell and Portherras have the same teams as Higher Boscaswell, a residential suburb, along with other places throughout TR postcodes. Telling us your TR19 7 postcode pins you quickest of all. Whether your car is on a lay-by on the way to Silver Jubilee Park or in a car park in the middle of Higher Boscaswell, it doesn't need to shift. The van empties it in place. Tricky to explain? Close to Engine House or a border? Asking is better than assuming, and so phone. ## The one-line version Not run yet: keep it off and ring. Already run: stop, switch off then ring. Either way, Petrol in Diesel takes it from there around Higher Boscaswell and anywhere in Cornwall on 0333 366 0103.