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Petrol in Diesel

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Avoiding AdBlue in a Diesel Tank in Cherrytree Green: Why It Occurs

If AdBlue is already in your diesel tank, stop reading for a moment: leave the engine and the ignition off and phone 0333 366 0103. Caught before your engine runs, it is usually a drain and a thorough flush, done where the vehicle is in Cherrytree Green. The remainder of this page covers why it happens and how to ensure it does not — useful if you're reading ahead of time.

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AdBlue in a diesel vehicle, and its separate tank

Plenty of modern diesels on the roads around Cherrytree Green and Winston Green carry two liquids, not one. Diesel goes to the motor. AdBlue's own tank keeps it, and from there it goes to your exhaust, where a spray treats the fumes.

Separate tanks, separate fillers. Under one flap, next to each other: that's the arrangement on many vehicles. On others, AdBlue's filler sits beneath the bonnet or in your boot instead. Topping up the diesel side at the pump happens all the time. Rarely topped up, AdBlue usually goes in from a bottle, tipped by someone who must stop and think which cap it needs. Mistakes happen in that gap between them.

How does AdBlue in your diesel tank take place in Cherrytree Green?

It is hardly ever carelessness. Three things tend to line up.

On a drive off Cherry Tree Lane before work, or in the car park at Woolpack heading home: that's where the rushed top-up takes place. Why the rush? As AdBlue gets low the vehicle warns you, and if it's empty, limp mode follows.

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

A spouted bottle meets no resistance at a diesel filler any more than at an AdBlue one. So the pour, after started, carries on. Whether it occurs in Debenham or the middle of Cherrytree Green, it is the same few seconds.

Flushing a diesel fuel system after AdBlue, Cherrytree Green

Telling the AdBlue filler from the diesel filler

Before you tip anything, whether on a drive in Aspall or a forecourt in Cherrytree Green, check these. They take a couple of seconds.

  • Colour and marking: an AdBlue cap is often blue, or says "AdBlue", where a diesel cap normally does not. Go by the cap, not its position.
  • Many vehicles fit AdBlue the smaller neck of the two.
  • Open the flap and look for a label — plenty of vehicles mark what goes in which filler just there.
  • In your boot or under the bonnet: that is where your filler sits if it's not by the diesel cap, and the handbook says which.
  • The person who drove it last. On a hire or company car collected from somewhere like the car park outside Needham Market, ask before you leave, not when the light comes on.

AdBlue top-ups that never reach the diesel tank

A routine for the day the light comes on, wherever across Suffolk that is.

  • Stop on level, engine off, with time in hand — never hurried on the side of Deben Rise.
  • Daft as it sounds, saying "AdBlue" aloud while you unscrew the cap works — once you have located the filler and read the cap.
  • If both sit under one flap, check your diesel cap is still closed before you lift the bottle — and leave the car on.
  • Stop when your tank fills or the bottle is empty; until then, pour gently through the own spout.
  • Only then, start the vehicle: close the cap, check again, and make sure the diesel cap was never opened.

Find at stage two or three that it's already gone into your diesel side? So stop right there. Never go on to stage five.

Put AdBlue in the diesel tank in Cherrytree Green already?

Brief list, then. First: your engine remains off. The fuel pump runs on many diesels as soon as the ignition is switched on — so leave it off. Topping up with diesel will not weaken it: rather than mixing, AdBlue sinks to the bottom of that tank, right where the fuel is drawn from.

Ask the attendants to help roll the vehicle clear of the petrol pump if you're on a forecourt — the Evergreen Garage (Crowfield) Ltd, the BP or somewhere else. At home in Cherrytree Green? So your car stays put.

Stop as soon as it is safe then switch off, if your motor has already run. Cherrytree Green lies under 50 miles from the M11; there, use the first junction. Tell us roughly how far it went: a run towards Colchester, under 50 miles away, is a bigger job than a short hop across Cherrytree Green.

Cherrytree Green: what takes place when our technicians get there

Our engineers come to the car wherever it has stopped, whether that is outside Sir Robert Hitcham Church of England Voluntary Aided School, near Debenham Village Sign or on your own drive. Our technicians ask what was put in, about how much, and whether it has run, because those answers decide the work and the price. No one heads out until you've had our quote over the phone.

Draining that tank comes next, then a full flush of your system. Unlike petrol, AdBlue forms crystals and eats at certain fuel-system metals, and none of it clears away by itself. Hence it matters more. After your filter is flushed — or replaced, if needed — fresh diesel is added, and finally your vehicle gets tested. Before leaving, our technicians start the car and confirm that it's running smoothly.

If the engine has not run, the majority of jobs take about half an hour once we're there, using pumps that are safe on a busy forecourt and quiet enough to use outside a house 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 look at yours.

About Cherrytree Green

Cherrytree Green is a suburban area in Suffolk, situated near the River Deben and characterised by detached housing. Cherrytree Green sits at an elevation of 37 metres, with views of the surrounding countryside. Cherrytree Green is located near the villages of Debenham and Winston, and is within commuting distance of Colchester. Cherrytree Green remains a relatively small community, with a population of around 1951 residents.

AdBlue drains round Cherrytree Green, and Suffolk beyond

Being a residential suburb, Cherrytree Green shares its vans surrounding areas — Fen Street, Winston — all the way across IP postcodes and the surrounding area beyond. Quickest of all: quote a IP14 6 postcode for the van.

The car remains put. Our engineers drain it where it is — a side street close to Saint Mary Magdalene, a lay-by on the way to Hogg's Kiss Wood, a driveway. Awkward to pin down, like the back of Dove Cottage? By a county line? Checking is better than assuming, and so ring.

For Cherrytree Green motorists, the short version

Pour no AdBlue until you've read the cap. If AdBlue has gone in your diesel tank all the same, leave the car off and ring 0333 366 0103. Petrol in Diesel empties it where it waits, anywhere across Suffolk.

Call 0333 366 0103