---
title: AdBlue in a Diesel Tank Charleston? Read This
canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/charleston-highland/
location: Charleston
county: Highland
latitude: 57.506330
longitude: -4.262280
service: AdBlue in a Diesel Tank
updated: 2026-10-25
---

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

Leave your motor and ignition off and ring 0333 366 0103 now — reading can wait when AdBlue is already in your diesel tank.

A drain plus a thorough flush, carried out right where the vehicle sits around Charleston, is usually all it needs if found before your motor runs.

If you are reading before it has happened, the rest of this page is about why it takes place and how to make sure it doesn't.

## AdBlue in a diesel car: two tanks, two fillers

Plenty of modern diesels around Drumsmittal, as well as Charleston, carry on two liquids; your motor takes just the diesel.

Your exhaust, not your engine, is where AdBlue goes: dosed into the fumes to fresh it, from its own tank.

Each tank has a filler of its own.

Plenty of motors have a single flap for both, whereas some move the AdBlue filler to the boot or under the bonnet.

Filling your diesel side at the pump happens all the time.

Far less frequently, the AdBlue side is filled — mostly from a bottle, by someone working out where it goes.

The slip lives in that gap.

## How does AdBlue in the diesel tank take place around Charleston?

Three things tend to come together, and carelessness is rarely one of them.

To start with, the warning. Low AdBlue triggers a warning from the car, and running dry means limp mode — hence a rushed top-up, maybe before work off Millbank, perhaps outside the pub in the village on the way home that evening.

New-to-you motors are next, as well. Rentals, new vehicles and company motors place their fillers differently, and habit reaches for the cap used on the old one.

Lastly, the bottle fits: a diesel filler or AdBlue one, it goes in just as readily, and once the pour begins, nothing halts it.

North Kessock or the heart of Charleston: it is the same few seconds either way.

## Which filler is for AdBlue, and which for diesel?

Look at these before pouring, at a forecourt around Charleston or a drive over in South Kessock. Seconds, that's all.

- Check the cap instead of going by position: AdBlue ones are regularly blue or marked "AdBlue", and diesel ones usually are not.

- Many motors give AdBlue the smaller filler of the two.

- Open the flap and check for a label — many vehicles show what belongs in which inlet right there.

- The handbook. If the filler isn't by your diesel cap, it's in the boot or under the bonnet, and the handbook says which.

- Ask the person who drove it last — before you leave, not when the light comes on — if you pick up a hire or company car from somewhere like the car park at Inverness.

## AdBlue top-ups that never reach the diesel tank

A routine for the day the light comes on, wherever in Highland that is.

- Stop somewhere level, engine off, with time to spare — never hurried on the side of Drumsmittal Road.

- Daft as it sounds, speaking "AdBlue" out loud as you unscrew the cap does the trick — after you've located your filler and read it.

- Both under one flap? So confirm the cap on the diesel side stays closed ahead of raising the bottle.

- Tip slowly, using the bottle's own spout. Stop when it's full or when the bottle is empty.

- Before you start your car, shut the cap and check again that the diesel cap was never came off.

If at stage two or three you find you have already poured into the diesel side, stop there.

Stage five stays out.

## AdBlue in the diesel tank already, around Charleston?

Don't start the engine: that's how the short order of things starts.

Do not switch the ignition on; on plenty of diesels that alone runs the fuel pump.

Thinning it with extra diesel fails, because AdBlue sinks to the base rather than mixing — and that's where your fuel is sucked from.

At a forecourt — Esso, BP or another — the staff will normally help roll the car away, when you ask.

If you are on your own driveway around Charleston, leave the vehicle where it stands.

When the motor has run already, pull over safely then turn it off.

On the M90, over 50 miles from Charleston, that means the next exit.

Tell us about how far it went: a run towards Inverness, under 3 miles away, is a bigger job than a short hop across Charleston.

## Charleston: what occurs when our engineers arrive

Wherever the vehicle came to rest, be it outside the local primary school, beside Knockbain Free Church or on your own drive, the van comes to it.

The replies decide the work and our quote, so our technicians ask what got in, roughly how much, and if it has run.

No one sets off before you've had our quote by phone.

The system is then flushed thoroughly, after the tank is drained.

Unlike petrol, AdBlue forms crystals and eats at some fuel-system metals, and none of it washes out by itself. Hence it matters more.

The fuel filter is flushed, or replaced where it needs to be; clean diesel goes in; and your car is tested.

We don't leave until it has been started and is running correctly.

If the motor hasn't run, most jobs take about half an hour once we're there, using pumps that are fine on a busy forecourt and quiet enough to use outside a house at night.

You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer.

It is worth checking your policy as the van travels to you: misfuelling cover is included with plenty of policies.

## About Charleston itself

Charleston is a small suburban area situated on the coast of Highland, Scotland, with a mix of detached housing and scenic views. Charleston sits near the Moray Firth, approximately 2.3 miles from Inverness, and is close to nearby places such as North Kessock and Croftnacriech. Charleston has a relatively low elevation of 24 metres and is home to around 1180 residents. Charleston is part of the wider Inverness urban area, with the city centre within easy reach.

## AdBlue drains round Charleston, and Highland beyond

Charleston is a residential suburb, and our vans that cover it also work the places around it, Croftnacriech and Craigton among them, across the IV postcode area.

A postcode starting IV1 3 gets the van to you fastest.

The vehicle remains where it is.

Our technicians drain it where it is — a side street near Underpass mural, a lay-by on the way to Community orchard, a driveway.

Tricky to explain, like the back of North Kessock Village Hall? By a border? Asking is better than assuming, so phone.

## In short, for Charleston motorists

Always, the cap; then, the tip.

Still AdBlue in the diesel tank? Petrol in Diesel can drain it wherever it is, anywhere across Highland: switch it off then ring 0333 366 0103.
