--- title: What Now? AdBlue in a Diesel Tank Long Wittenham canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/long-wittenham-oxfordshire/ location: Long Wittenham county: Oxfordshire latitude: 51.639750 longitude: -1.212930 service: AdBlue in a Diesel Tank updated: 2026-10-04 --- # Long Wittenham: AdBlue in the Diesel Tank? Find Your Situation What to do about AdBlue in a diesel tank comes down to one thing more than any other: whether the engine has been run since it went in. Anywhere the vehicle stands — Burcot, Long Wittenham — don't run a motor that hasn't run yet. Normally this is draining and properly purging it on the spot in Long Wittenham — and so keep your key and motor off then phone 0333 366 0103. If it has run, stop as soon as it is safe and switch off. Stage one remains unchanged, even if the work is bigger. Find the situation below that matches yours, wherever around Oxfordshire it happened. ## At the pump in Long Wittenham: AdBlue in a diesel Imagine it: stood by the petrol pump, holding the nozzle, you realise the cap you took off was not the correct one. Whether Murco, Sainsbury's or somewhere else in Long Wittenham, the case is the same. The upshot: of all places to find out, the forecourt is the best. The AdBlue is inside your tank and nowhere else. Nothing has sucked it in. Your move: stay out of the driver's seat, however much the pump wants freeing. Ring us from the forecourt once the car is in a space — the attendants will lend a hand to roll it — then save the bottle. Can't move the car by the petrol pump? Explosion-proof equipment makes a busy forecourt safe, so it can be drained where it is. ## AdBlue in the diesel tank at home in Long Wittenham Several days had gone by with the warning light on. Bought a bottle, poured it in outside the house, recycled the empty — and at that point looked at the cap again, after the fact. Homes just off High Street get hit as often as everywhere else. What it means: if you haven't driven since, this is almost as good as the forecourt. AdBlue does not mix with diesel; it sinks to the bottom of that tank and waits there. Overnight does not change that. Next: stop an early move by putting your keys in the house, then ring us. Clifton Hampden or Long Wittenham: wherever your drive sits, that's where it is cleared. Night-time empties beside a house are no problem: the pumps are quiet. ## On the road around Long Wittenham with AdBlue in a diesel A short way beyond topping up, your motor began playing up: roughness, smoke, lost power, lights on your dash. Possibly it was on Fieldside, maybe on the way out towards Oxford, under 10 miles away. What it means: your fuel system has drawn the AdBlue in. It has been through the filter and the fuel lines and, the further you went, into your high-pressure pump and your injectors. Each mile and each restart takes it further. Do this: pull up anywhere sensible, then switch the motor off. Service stations further on are too far: on the M40, under 10 miles out of Long Wittenham, use the next junction. No trial starts: clearing is not something AdBlue does. Tell us hear the mileage driven as you call. ## AdBlue in the wrong tank of a hire, lease or company car You've only driven this vehicle for days. Unbeknown to you, the two fillers sit side by side here — unlike your own vehicle, which has none or keeps it in another spot. Throughout Oxfordshire, no one is immune. Meaning? Whatever case above counts too — run or unrun — and one further stage. Plenty of rental and fleet agreements require the owner's approval before work. Settling it before the van turn up is faster, so ring the rental company or your fleet manager, then us. If you're stuck in the car park at Appleford, or by Long Wittenham Village Hall, while you wait for an answer, leave the car off. ## AdBlue in your diesel tank? Not sure, in Long Wittenham Now and then, "I think so" is the most anyone can truthfully say. What cap was taken off, you cannot say; but the bottle feels lighter than it ought to, and ammonia hangs by the filler. It might have been at a friend's driveway in Bridge End, or rushing by Long Wittenham (Church of England) Primary School on the school run. Put simply: spillage round your filler leaves your motor no harm. AdBlue inside your diesel tank does. Any AdBlue in the tank will be sucked in by turning on the vehicle, and the start would not settle which it is in any case. Do this: act as though it got in, and don't start your motor. Ring us and describe what you saw; we would rather check a tank that turns out free of AdBlue than drain one that has already been run. ## The common ground in each Long Wittenham AdBlue drain The work begins identically, whatever your situation. Three questions come once our engineers reach your car — at a filling station, a driveway, a road beside Pendon Museum or the car park outside The Plough: the liquid, the quantity, and whether the motor has been started. On the phone, ahead of dispatch, you are told our quote, and those answers shape the job too. Then your tank is emptied and the system flushed 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 doesn't rinse out on its own. Finally come the fuel filter, flushed or renewed as needed; fresh diesel; and a check of your car. If the motor hasn't run, most jobs take about half an hour once we are there. The final step is firing it up. Our check that it runs properly on new diesel comes before we leave. Long-term damage is very unusual if it's noticed soon, and the whole job is done where the vehicle is. Payment is on the day, never upfront. For the insurer, there is a VAT invoice plus a written report from the engineer. Many insurance policies include misfuelling cover, and so it's worth checking yours while we are on the way. ## About Long Wittenham Long Wittenham is a village situated on the banks of the River Thames in Oxfordshire, with a low elevation of around 52 metres. Long Wittenham lies approximately 8 miles south of Oxford and 47.5 miles west of London, making it a commuter village with a mix of old and new housing, predominantly detached homes. Long Wittenham is surrounded by other small villages, including Clifton Hampden, Appleford-on-Thames, and Little Wittenham, and has a population of around 824 residents. ## AdBlue drains about Long Wittenham and across Oxfordshire Appleford-on-Thames and Little Wittenham have the identical vans as Long Wittenham, a village, plus further towns throughout OX postcodes. Telling us your OX14 4 postcode finds you quickest of all. Central Long Wittenham or a layby near Neptune Wood: either way it is, the vehicle never needs to move an inch for us. We drain it where it is. Phone and ask instead of guessing if you are close to Saint Mary, near a boundary, or anywhere tricky to explain. ## Your scenario, in one line Not run yet: keep the vehicle off then call. Whatever line fits, Petrol in Diesel handles the rest on 0333 366 0103, throughout Oxfordshire and in Long Wittenham — after you stop, turn off then ring, if it has run.