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Petrol in Diesel

0333 366 0103

AdBlue in a Diesel Tank in Penygraigwen: How It Occurs and How to Prevent It

AdBlue already in your diesel tank? In that case set this page down a moment, leave the ignition and engine off, and ring 0333 366 0103. Usually, if your motor hasn't run, it's drained and thoroughly flushed where your vehicle sits in Penygraigwen. Reading in advance? In that case the rest explains how it comes about and how to stop it ever happening.

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AdBlue in a diesel car: two tanks, two fillers

Not one fluid but two: that is how plenty of modern diesels near Penygraigwen and Pontypridd run, with diesel feeding your engine. The exhaust, not the motor, is where AdBlue ends up: sprayed into the gas to fresh them, from its own tank.

Each tank comes with one filler of its own. Many of vehicles have a single flap for both, while some move the AdBlue filler to your boot or under the bonnet. Diesel goes in on each forecourt visit, week in, week out. Far less commonly, the AdBlue side gets filled — mostly from a bottle, by a person thinking about where it goes. It's in the gap that the error lives.

AdBlue in your diesel tank around Penygraigwen: how it happens

Seldom is it carelessness: normally three things line up.

First, the warning. Low AdBlue triggers a warning from the car, and letting it run dry means limp mode — so a rushed top-up, perhaps before work off Graigwen Road, perhaps outside The Merlin on the way home after work.

The old car's cap is where the hand reaches — but a rental car, a new vehicle or a company car puts the fillers somewhere else. That's the second factor: a strange car.

A spouted bottle meets no obstacle at a diesel filler no more than at an AdBlue one. And so the pour, once started, keeps on. The same few seconds decide it, in the middle of Penygraigwen or out in Graigwen.

Flushing a diesel fuel system after AdBlue, Penygraigwen

Telling the AdBlue filler from the diesel filler

Check these before pouring, on a forecourt around Penygraigwen or a drive over in Troedrhiw-Trwyn. A few seconds, that's all.

  • Position can mislead; the cap doesn't. AdBlue caps tend to be blue or bear the word "AdBlue" — diesel ones usually do not.
  • Check the size: the smaller filler neck is, on many cars, the AdBlue one.
  • Lift the filler flap and check for a label — plenty of cars mark which goes in each inlet right there.
  • The handbook says where it is if the filler is not next to the diesel cap: your boot, or under the bonnet.
  • Whoever had it before will know. Check when you collect a hire car or company car — at Pontypridd's car park, perhaps — not when the light appears.

Keeping AdBlue out of your diesel tank when you top up

A routine for the day the light comes on, wherever across Rhondda Cynon Taf that is.

  • Not in a rush on the side of Hillside View, not on a slope, not with the engine running: park and switch off properly.
  • Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and read it. Silly, perhaps, but it does the trick.
  • Leave the diesel cap on. If both sit under one flap, check the diesel cap is still closed before you lift the bottle.
  • Finish once the tank fills or the bottle runs dry; until then, pour slowly through its own spout.
  • Close the cap and check again. Make sure the diesel cap was never opened. Only then start the car.

If at step two or three you find you have already poured into your diesel side, stop there. Step five is out.

AdBlue in the diesel tank already, around Penygraigwen?

Short order, then. First: your engine stays unstarted. On many diesels your ignition alone runs the fuel pump, and so do not switch the car on. AdBlue doesn't mix with diesel — it sinks to the bottom of that tank, where your fuel is pulled from — so don't top up with diesel to dilute it.

The attendants at Asda, Sainsbury's or any forecourt will normally lend a hand pushing your car clear when you ask. On your own drive in Penygraigwen? So the vehicle stays put.

If the motor has already run, stop as soon as it is safe then switch off. The next exit is where to leave when you are on the M4, under 10 miles from Penygraigwen. Tell us roughly how far it went: a run towards Cardiff, under 15 miles away, is a bigger job than a short hop across Penygraigwen.

What occurs when our technicians get there around Penygraigwen

Anywhere the vehicle came to rest, whether by the local primary school, beside Indoor Bowls Centre or on your own drive, the van travels to it. Those replies settle the work and our quote, so our engineers ask what was put in, about how much, and if it has run. On the phone call itself, you hear our quote — ahead of dispatch.

Your system is then cleaned thoroughly, once the tank is cleared. Much more than with petrol, it counts here: crystals build up, some metals are attacked, and nothing washes away on its own, no matter how long it sits. The filter cleaned or, where it must be, replaced; clean diesel in; then a test of the car. The motor is started next and tested to make sure it runs smoothly, all before our engineers go.

Unrun vehicles usually mean a half-hour visit from the moment we arrive. The equipment is safe on a busy filling station, and hushed enough for a residential street late at night. Payment happens on the day, not upfront, and you are given the paperwork your insurer asks for: an engineer report and a VAT invoice. Wrong-fuel cover is part of many insurance policies — so use the wait to check yours.

About Penygraigwen

Penygraigwen is a suburban area situated on the riverside in Rhondda Cynon Taf, with a mix of terraced housing and local amenities. Penygraigwen sits at an elevation of 143 metres, close to the nearby communities of Graigwen and Pantygraig Wen. Penygraigwen is located near the city of Cardiff, which is approximately 11.5 miles away, and is part of the wider South Wales urban area. Penygraigwen has a population of around 4966 people, living in a predominantly residential environment.

Penygraigwen and Rhondda Cynon Taf: AdBlue drains across the area

Pantygraig Wen and Pwll-Gwaun are among the towns near Penygraigwen, a residential suburb, that the same teams cover, throughout CF postcodes. Quote a postcode that starts CF37 2, and the van arrives quickest.

Your car stays where it is. Our engineers drain it where it is — a side street near Pontypridd RFC, a lay-by on the way to Coedcae Berwerdy, a driveway. Ring and ask instead of guessing if you are near a boundary, or somewhere hard to explain, like the back of Muni Arts Centre.

Penygraigwen drivers: the short version

Pour no AdBlue till you've read the cap. If AdBlue has gone in your diesel tank anyway, leave the car off then phone 0333 366 0103. Petrol in Diesel clears it where it waits, anywhere in Rhondda Cynon Taf.

Call 0333 366 0103