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Hi Declan,

It’s a tough one. Generally I’d say for the moment, diesel is still best for that kind of mileage, especially day-to-day. A model with a good stop-start system should help keep the consumption down in heavy traffic (Mazda’s system on the 6 2.2 diesel is especially good) and those long motorway miles are just what diesel was designed for. A plugin hybrid is really for those doing short urban journeys most days, with only an occasional long trip, so I don’t think any would be really suitable for you. It would be worth looking at a new-shape Toyota Prius hybrid though – we managed to average 60mpg in one recently over the course of a week, including several long motorway runs, so it’s worth thinking about.

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Hi John,

No, it’s not just another cost to the consumer. Stop-start systems are designed to prevent the car from running the engine unnecessarily at standstill when doing so would be at its most wasteful of fuel. After all, if you’re not moving then what is the point in having the engine on? Stop-start systems are specially designed with either a beefed-up alternator or an integrated starter/generator so that it can handle multiple stops and restarts in rapid succession, and it’s estimated that on an average car, stop-start can save as much as ten per cent of overall fuel consumption – not to be sniffed at, never mind the benefits to city-centre air quality.

Admittedly, the car makers have brought in stop-start to bring their cars' official CO₂ and fuel consumption figures down, and the benefits are only really felt if you are stopping and starting regularly. If you spend all your driving time on the motorway then you won't use the system at all.

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Hi Miceal,

As a trade-in, somewhere in the region of €8,000 I would think.

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Hi Mairead,

It depends which model you mean. An automatic 2.0-litre VVT-i petrol RAV4 from 2008 has CO₂ emissions of 212g/km, so will cost €1,200 a year. The manual version has CO₂ emissions of 202g/km so costs the same. It gets a bit better with the diesels. The 180hp 2.2 diesel has emissions of 185g/km so costs €750 a year while the 150hp version has emissions of 173g/km so costs the same €750.

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Hi John,

It depends on the engine. The 1.6-litre petrol needs it to be changed every 160,000km or every eight years, the 1.8, 2.0 and 2.2 diesels need to have their belts changed every 200,000km or every 10 years.

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Hi David,

They’re not bad actually. The only major mechanical items that cause regular bother are the engine’s exhaust gas recirculation valve (if the engine is down on power or putting out lots of smoke, suspect this…) and the fragile water pump on the 1.6 HDi diesel. That 1.6 also needs a steady diet of high grade oil at service time. The only other issues are minor electrical niggles, such as the electronic parking brake, sticking fuel filler flaps and the like. Buy one with a full service history and keep it serviced and you should be fine.

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Hi Philip,

Petrol is better for shorter trips, period. Apart from the extra cost of buying a diesel car (which as you correctly point out, narrows a bit with some models), there's the question of maintenance - doing short hops is just bad for a diesel engine as it won't warm through properly and you could develop problems with the particulate filter and other engine components.

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Hi John,

The Mazda6 - it's the best to drive and the most reliable. 

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Hi Brian,

There have been intermittently reported issues with Toyota gearboxes across the board, from sticking shifts to complete failures, but they tend to be quite rare overall, so if the car you’re looking at has a full service history then it should be OK. Ask for a warranty if you're really worried about it.

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Hi Jennifer,

You could try a Skoda Superb Combi, but I think that many big dogs would overwhelm even that car’s massive boot. Perhaps you need to go down the road of a van-based MPV. Maybe try a Citroen Berlingo or Volkswagen Caddy Life? Seats for the kids and (hopefully) enough space for the dogs, plus their tailgates aren’t too high off the ground so the older dogs shouldn’t have too much trouble getting in and out.