--- title: Tweenaways: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/tweenaways-devon/ location: Tweenaways county: Devon latitude: 50.426170 longitude: -3.591640 service: AdBlue in a Diesel Tank updated: 2026-10-13 --- # How It Occurs and How to Prevent It: AdBlue in a Diesel Tank in Tweenaways Stop here for a moment when the diesel tank already has AdBlue in it: ignition off, motor off, and phone 0333 366 0103. Caught before your motor runs, it is usually a drain and a thorough flush, done where the vehicle is around Tweenaways. Reading in advance? In that case what follows covers why it happens and how to stop it happening at all. ## AdBlue in a diesel car, and its separate tank Many newer diesels around Collaton St Mary, like those in Tweenaways, carry on two fluids; your motor takes only the diesel. Stored in a tank of its own, AdBlue is sprayed into your exhaust gas and cleans it. Each tank has its own filler. Plenty of cars share a single flap for both, while some move the AdBlue filler to your boot or under the bonnet. Topping up the diesel side at the petrol pump goes on constantly. Far less frequently, the AdBlue side is topped up — mostly from a bottle, by a person working out where it goes. The mistake grows in that gap between the two. ## AdBlue in the diesel tank in Tweenaways: how it takes place Three things tend to come together, and carelessness is rarely one of them. On a driveway off Tor Park Road before work, or in the car park at The Parkers Arms on the way home: that is where the hurried top-up happens. What is the reason for the rush? As AdBlue gets low your car warns you, and once it's empty, limp mode follows. Next, your hand reaches for the cap it knew on the old car — because a hire car, a new car or a company car puts the fillers somewhere your last one didn't. And the bottle fits. A bottle with a spout goes into a diesel filler as easily as an AdBlue one, and so nothing stops the tip after it has started. Whether it happens in Higher Yalberton or the middle of Tweenaways, it's the same few seconds. ## Telling the AdBlue filler from your diesel filler Be it a Tweenaways forecourt or a driveway out in Little Blagdon, spend a couple of seconds on these before anything is poured in. - The cap. The AdBlue cap is commonly blue, or marked "AdBlue". The diesel cap normally isn't. Read it rather than going by where it sits. - Check the size: the smaller filler neck is, on many cars, the AdBlue one. - Lift the flap and look for a label — many vehicles show which belongs in each filler just there. - The handbook says where it is if your filler is not next to the diesel cap: the boot, or under the bonnet. - The previous driver will know. Check as you collect a rental or fleet car — at Paignton's car park, perhaps — rather than once the light appears. ## How to top up without AdBlue in the diesel tank Wherever across Devon the light comes on, this is a routine for that day. - Turn off after you park — flat ground, motor off, and not rushed beside Longstone Road at the roadside. - Find the AdBlue filler and read the cap. Say "AdBlue" out loud as you unscrew it. It sounds daft and it does the trick. - The diesel cap remains on. Where the two share a flap, make sure it's closed before lifting the bottle. - Finish once that tank fills or the bottle runs dry; before that, tip gently through the own spout. - Only after that, start the car: close the cap, check again, and make sure your diesel cap was never opened. Spot at step two or three that it's already gone into your diesel side? Then stop just there. Skip stage five altogether. ## Already put AdBlue in your diesel tank in Tweenaways? Brief list, then. Top of that: the motor stays off. On plenty of diesels your ignition alone runs the fuel pump, and so don't switch the car on. Don't top up with diesel to thin it: AdBlue does not mix with diesel, it sinks to the bottom of the tank, where your fuel is pulled from. The staff at Sainsbury's, Morrisons or any forecourt will usually lend a hand to push the car clear when asked. At home around Tweenaways? Then the car remains put. Stop as soon as it is safe and switch off, if the motor has already run. On the M5, under 25 miles from Tweenaways, that means the next junction. Tell us about how far it went: a run towards Exeter, under 25 miles away, is a bigger job than a short hop across Tweenaways. ## Tweenaways: what happens when our engineers turn up Outside Collaton St Mary Church of England Primary School, near Great Parks Chapel or on your own drive: wherever your car has stopped, our technicians come to it. Our technicians ask what went in, roughly how much, and whether it's run, since the answers determine this work and our price. You get that price on the phone, before anyone sets off. Next: draining, then a full flush of the whole system. AdBlue crystallises and is corrosive to some of the metals in a fuel system, so it does not wash out on its own — which is why the flush matters more here than with petrol. A test comes at the end: before that, fresh diesel goes in, and the fuel filter is flushed or replaced if necessary. Then our technicians fire it up and check it runs correctly before leaving. Unrun cars usually mean a half-hour job from the moment we arrive. The kit is safe on a busy filling station, and hushed enough for a residential street after dark. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. Misfuelling cover is included in many insurance policies — so make use of the wait to check yours. ## About Tweenaways and where it is Tweenaways is a suburban area in Devon, situated near the coast and approximately 20 miles south of Exeter. Tweenaways has a population of around 2366 people and is characterised by terraced housing. Tweenaways sits at an elevation of 56 metres, overlooking the surrounding coastal landscape. Tweenaways is close to nearby places such as Higher Yalberton, Yalberton, and St Michaels. ## AdBlue drains in Tweenaways and across Devon Tweenaways is a residential suburb, and our vans that cover it also work the towns near it, Yalberton and St Michaels among them, across the TQ postcode area. Give a postcode that starts TQ4 7, and the van arrives quickest. Your car remains put. Our engineers drain it where it is — a side street near Collaton Saint Mary Church, a lay-by on the way to Howler monkey Island, a drive. Assuming doesn't help behind Paignton Zoo, on a border, or anywhere awkward to describe; phone and ask. ## In short, for Tweenaways people Before you tip, read the cap. AdBlue in the diesel tank regardless? Keep the vehicle off then ring 0333 366 0103; Petrol in Diesel empties it where it stands, throughout Devon.