Expert answer

Hi Philip,

The short answer is that there are some benefits to using additives, but they’re not a miracle cure. Some additives, such as Redex, STP, or Dipetane, can apparently help to reduce the build-up of carbonised particles of soot and burned fuel on the insides of your engine, which can lead to improvements in reliability, fuel economy and emissions.

That said, there’s little here that’s scientifically proven. The benefits of additives tend to be more word-of-mouth than provable fact, but there’s certainly no harm in using them and if you notice a benefit, well that’s all to the good.

I would suggest that you’re better off sticking to a strict service regimen, using original parts and a qualified technical, than relying on additives though. And of course, as you already know, diesels need to be driven regularly to stay in good condition.

Expert answer

Hi Jitu,

Of those three, we’d go for the Astra every time. The i20 is fine, but a little dull. The EcoSport is an awful car so don’t go near it. The Astra, though, is well made, engaging to drive, roomy and economical. Go for the 1.0-litre turbo petrol and you won’t go wrong. Here are our reviews of each:

Hyundai i20 review

Opel Astra review

Ford EcoSport review

Expert answer

Hi Mark,

While we haven’t loaded an Octavia 1.0 to its total maximum GVW capacity, we have driven it with four passengers and a boot full of luggage and it performs very well indeed. Not the fastest car around, no doubt, but we found no lack of performance and fuel economy remained at an impressive 50mpg.

Read our Skoda Octavia 1.0 TSI review

(there's a video review embedded in the copy, too)

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Hi there,

There's no completely easy answer I'm afraid, but the rule of thumb is that if you're doing low to medium mileage (below 20,000km a year) and drive in town a lot, go for petrol. If you're doing 20,000km+ and mostly on motorways diesel is still a good bet, but it's worth looking at the latest-tech hybrids too. 

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Hi Patrick,

Tough to call. It is the unloved engine, which will hurt resale, and the mileage is about twice the average, but even so €7,000 sounds frighteningly cheap. Does it have a full service history? Have you done a history check with Cartell.ie?

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Hi Enda,

There's a growing number of options for seven-seat SUVs. The new Skoda Kodiaq is excellent and €50k would buy you one with a lot of toys. The Kia Sorento is also in that price bracket and is big, roomy and hugely comfortable. Ditto the Hyundai Santa Fe. Peugeot's incoming new 5008 is worth a look too. Here are our reviews of them all to help you out:

Skoda Kodiaq review

Kia Sorento review

Hyundai Santa Fe review

Peugeot 5008 review

Expert answer

Hi Peter,

If you want a mix of fun, comfort and not diesel, it’s kind of hard to beat a Volkswagen Golf GTI. Superb performance, practical and comfy cabin and 45mpg if you drive it gently.

Other good options are a MINI Cooper (a touch noisy on longer journeys, but with very good seats), a Ford Fiesta ST (hands down the best hot hatch currently on sale, but perhaps lacking a little in comfort), or a Peugeot 308 in GT spec with the 130hp 1.2-litre PureTech petrol engine.

Expert answer

Hi John,

OK, lots and lots of options. How about a Fiat 500? Great looking, fun to drive, well made and that 1.2-litre petrol engine is willing enough to tackle motorway work from time to time.

Late 2000s MINIs fall into your budget too, and they're great fun to drive, roomier than the 500 (well, a bit) and solid on longer journeys.

You could be dead sensible and go for an Audi A3 1.6 petrol and there'd be nothing wrong with that - ticks all the boxes.

Or maybe something a bit more left-field? How about a Volkswagen Beetle? An original Mini (we did find one in your budget) or even a Smart ForTwo Brabus?

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Hi Donal,

Yup, Alfa is definitely offering some very sharp value deals on the Giulia at the moment, especially when you consider that you can effectively get a mid-spec car for the same price as a basic model. It’s a car we really like — it’s gorgeous, terrific to drive, practical and Alfa seems at last to have gotten on top of its quality issues. Two caveats, really — the infotainment system is not as sophisticated as you’d find in rival models, and to see the Giulia at its best, you really need to avoid the 2.2 diesel and go instead for the 200hp turbo petrol, although obviously that may not suit your needs.

Read our Alfa Romeo Giulia review here

Expert answer

Hi Kay,

Yes, you should see a considerable saving on fuel, probably in the order of 10mpg at least, depending on how and where you drive. It is worth noting, though, that you will also be looking at considerably higher maintenance and servicing costs, as the 320d is much more sophisticated and high-tech than your Golf and, without careful, regular attention from a specialist they can start giving serious trouble.