--- title: Martlesham Heath: AdBlue in a Diesel Tank, Explained canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/martlesham-heath-suffolk/ location: Martlesham Heath county: Suffolk latitude: 52.059980 longitude: 1.274550 service: AdBlue in a Diesel Tank updated: 2026-10-13 --- # Martlesham Heath: How Does AdBlue End Up in a Diesel Tank, and How Do You Prevent It? Keep the engine and ignition off then ring 0333 366 0103 first — the rest can wait when AdBlue is already in your diesel tank. Caught before your engine runs, it is usually a drain and a thorough flush, done where the car is around Martlesham Heath. Not happened yet? Further down, the page covers the why it happens and the how to avoid it for good. ## AdBlue in a diesel vehicle: two tanks, two fillers Many newer diesels in Kesgrave, like those in Martlesham Heath, carry on two liquids; the motor takes only your diesel. AdBlue's own tank keeps it, and from there it is sent to the exhaust, and there a spray cleans the fumes. Each tank has its own filler. Many of cars have a single flap for both, whereas some move the AdBlue filler to your boot or under the bonnet. Diesel goes in at every filling station call-out, week in, week out. The AdBlue side is fuelled far less frequently, usually from a bottle, and normally by somebody who has to stop and think where it goes. It is in that gap that the error lives. ## How AdBlue in your diesel tank happens in Martlesham Heath Three things tend to line up, and carelessness is seldom one of them. The warning comes first. As AdBlue runs low the vehicle tells you, and if it runs out altogether, the car drops into limp mode. So the top-up is done in a hurry: on a drive off Sidecentre Gate before work, or in the car park outside The Douglas Bader on the way home. New-to-you motors are next, too. Hire cars, new motors and company cars place their fillers in new places, and the hand reaches for the cap it used on the old one. Nothing stops the tip after it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Martlesham or the heart of Martlesham Heath: it takes the same few seconds either way. ## How to tell the AdBlue filler from the diesel one Before you pour anything, whether on a driveway in Little Bealings or a forecourt around Martlesham Heath, check these. They take a few seconds. - Position can mislead; the cap does not. AdBlue ones are often blue or bear the name "AdBlue" — diesel caps usually don't. - Look at the size: the smaller filler neck is, on plenty of cars, the AdBlue one. - Look inside your fuel flap: many cars have a label there showing which fuel goes where. - Cannot see it next to your diesel filler? In that case check beneath the bonnet or inside the boot — the handbook will say which. - Picking up a hire or company car, perhaps at the car park at Woodbridge? Check with the person who drove it last before you set off, rather than once the light goes on. ## AdBlue top-ups that never reach your diesel tank For the day the warning appears — wherever it is in Suffolk — a simple routine to follow. - Park then switch off. Not on a slope, not with the engine running, and not in a rush on the side of Lark Rise. - Say "AdBlue" out loud as you unscrew the cap, once you find the AdBlue filler and read it. Daft, perhaps, yet it works. - If both sit under one flap, check your diesel cap is still closed before you lift the bottle — then leave the car on. - Using the bottle's own spout, pour slowly — and stop when it is full or the bottle is empty. - Only then, start the vehicle: close the cap, check once more, and make sure the diesel cap was never opened. Discover at the second or third step that AdBlue went into the wrong filler? That is where you stop. Step five is out. ## Already put AdBlue in the diesel tank around Martlesham Heath? What follows is a short order of things, beginning with no starting the engine. On plenty of diesels the ignition alone runs the fuel pump, so do not switch it on. Filling up with diesel won't weaken it: rather than mixing, AdBlue drops to the bottom of your tank, just where the fuel is taken from. If you are at a forecourt, whether it is the BP or the Tesco, ask the attendants to help roll the vehicle away from the petrol pump. Leave it where it is if you're on your own drive around Martlesham Heath. Already started? Pull over when it's safe, then switch off. Martlesham Heath lies under 50 miles from the M11; there, use the first exit. A short hop across Martlesham Heath is a smaller job than a run towards Colchester, under 25 miles away, and so tell us about how far it went. ## Our arrival around Martlesham Heath, and what takes place next We come to the car wherever it has stopped, whether that's outside Birchwood Primary School, close to Martlesham Village Sign or on your own drive. What liquid went in, the amount, and if it ran: our engineers ask because the replies decide both work and quote. Nobody heads out before you have heard our quote by phone. Draining that tank comes next, followed by a full flush of your system. Much more than with petrol, it matters here: the crystals form, some metals are attacked, and nothing washes away unaided, however long it is left. The filter cleaned or, if it must be, swapped; fresh diesel in; and then a test of your car. Next our technicians start the car and check it runs properly before leaving. If the engine hasn't run, most jobs take about half an hour once we are there, using pumps that are fine 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. It's worth checking your policy while we travel to you: misfuelling cover comes with many policies. ## About Martlesham Heath Martlesham Heath is a village in Suffolk, situated inland at an elevation of 28 metres, and is located near the villages of Martlesham and Waldringfield Heath. Martlesham Heath has a population of approximately 1301 residents, who mostly live in detached houses. Martlesham Heath is also close to the village of Brightwell and the city of Colchester, which is 19.8 miles away. Martlesham Heath is about 71.1 miles from London, making it a rural community with some commuter links. ## AdBlue drains round Martlesham Heath, and Suffolk beyond Martlesham Heath is a rural village, and our teams that cover it also work the towns around it, Waldringfield Heath and Brightwell among them, across the IP postcode area. Fastest of all: quote a IP5 3 postcode for our van. Your car stays where it is. We drain it where it is — a side street close to St Michael & All Angels, a lay-by on the way to The Green, a drive. Assuming doesn't help at the back of Martlesham Heath Pavilion, close to a boundary, or anywhere awkward to describe; phone and ask. ## The short version for Martlesham Heath drivers Read the cap before you pour. Petrol in Diesel empties it on the spot, anywhere in Suffolk, if AdBlue has gone in your diesel tank regardless — and so leave the car off then ring 0333 366 0103.