Currently reading: Land Rover Discovery Sport long-term test review: AdBlue top up
A warning light indicates that it’s time to pour in some more diesel exhaust fluid

Our Land Rover Discover Sport requires an AdBlue top up

Shortly before editorial assistant Doug Revolta borrowed the Discovery Sport for a holiday in Cornwall that included a visit to historic Pendennis Castle, the instrument display had begun to issue the occasional gentle warning that the diesel exhaust fluid (DEF) level was getting low.

DEF, better known as AdBlue, is a mixture of urea and distilled water used in modern diesel-engined cars to help clean up exhaust emissions, and you can’t afford to ignore the increasingly strident warnings for too long or the car will refuse to start.

I knew a top-up was looming but forgot to mention it to Doug before he set off for Cornwall, so it was hardly a surprise when he sent me a worried sounding text asking what he should do about the car’s renewed demands for AdBlue.

Disco 13th 991

I told him to bring the car back as it was and I’d sort it out.

This is the first diesel-engined car I’ve run for years, so the whole process of adding AdBlue was new to me, but I knew I’d be able to get bottles of the stuff at most service stations.

After consulting the handy leaflet on the subject that I found in the owner’s manual wallet, I bought two 1.5-litre spill-proof bottles, thinking that would be enough.

These bottles are designed to screw into the AdBlue filler spout — located in the engine bay, next to the bulkhead, in this case — so there’s no risk of making a mess. As it turned out, two bottles weren’t enough.

The service station didn’t have any more small bottles but pointed out that I could buy a 10-litre container of the fluid, with a fairly basic filler funnel, for barely any more than the £10 I’d paid for each of the 1.5-litre bottles.

Disco 13th 990

Ten litres seemed excessive, so I drove off to another service station, where I added another 1.5 litres. Frustratingly, the warning light was still lit when I fired up the engine.


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I was just about to give in and buy a 10-litre container when the light went out. I have no idea how close to being full the AdBlue tank is, but the car is happy for now.

Those 1.5-litre bottles strike me as a rip-off at £10 a pop. You’re mostly paying for the flash, idiot-proof container. Next time I’ll buy a 10-litre container and top up the tank the old-fashioned way.

I don’t expect any problems, but the weight of the 10-litre container and the height at which you have to hold it to reach the filler spout might make the task onerous for some.

Flexible front-end

Disco log

Whenever I wash the Discovery Sport, I’m surprised at the flexibility of the grille and other front-end bodywork when I press on them.

The logical reason is probably that the nose is designed to be as forgiving as possible in a pedestrian impact. Given how robust the car feels when you’re not prodding it, that ought to be welcome news for pedestrians.

Land Rover Discovery Sport TD4 180 HSE auto

Mileage 8590 List price £39,400 Price as tested £42,222 Economy 32.9mpg Faults None Expenses 4.5 litres of Adblue £31

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Will86 5 August 2016

Bit harsh

While almost an entire article on ad blue is maybe a little much, it's still part of the reality of running a modern diesel so relevant in a long term test.
marineboy 5 August 2016

Circus clowns.

It seems the decline in popularity of the circus has thrown a glut of clowns onto the labour market. Fortunately for the jobless figures, Autocar appears to be hiring them as 'motoring journalists'.
Wildboar 5 August 2016

I'd be more fed up that they

I'd be more fed up that they were only getting 32.9mpg when promised over 50