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Hi Jan,

Yes, if you’re doing fewer than circa 20,000km a year then you are indeed better off with petrol. If it’s the new-shape Hyundai i30 you’re talking about, the good news is that it does come with a deeply impressive 1.0-litre petrol turbo T-GDI engine, which is a belter. As for the particulate filter on the diesel, generally speaking a 25-30min run along the motorway, in fourth gear (at 120km/h where permitted), will do the job when it comes to keeping it clear.

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Hi Pat,

I'd say you're looking at a probable value of between €5,000 and €7,000 with that kind of mileage. Trading in probably the better route, unless it's a diesel you're selling. Private buyers just don't seem to want to know about petrol cars at the moment.

Let us know how you get on.

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Hi Sandra,

Yes, the N47 diesel certainly had its share of troubles with that timing chain, and sadly it’s not as simple as getting it changed at a specific mileage. It’s an engine-out job to change, and they can go without warning.

Because of that, if nothing else, we’d steer you to the 520d with the older engine, but also that’s a genuinely fantastic car, especially with the M Sport body kit - and hugely entertaining to drive. Plus it’s more practical and comfortable than the 3 Series Coupe. Just make certain that it comes with a full service history.

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Hi Brendan,

We're acutely aware of this, which is why we mentioned depreciation and other costs in our notes at the end of the article (here it is if anyone else is interested). Predicting future values of current cars is a black art that we'd rather not take part in!

Saying that, diesel cars currently hold their value a little better, but we suspect that may change in time, with the advent of more efficient petrol technology, plus, potentially, lower bills as a car gets much older. Along with all that of course is that fact that petrol cars will become very rare soon following our new car buying habits of the past four to five years.

Thanks for getting in touch.

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Hi Siegfried,

Yes, it's a cracking family car. A shame it's not the seven-seater, which is even more versatile again, but even so the Doblo has a great combination of practicality and affordability.

That 1.3 MultiJet diesel engine is a cracker too. Economical and decently reliable.

Can't recommend it highly enough, to be honest.

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Hi Patrick,

The official fuel figure for the Sportage petrol model of that era was 27mpg, but we'd expect you will probably do a little lower than that, most likely around 25mpg. It's not terrible, and you have to play that off agains the extra that a diesel model would cost, but it's not exactly economical. Then again, with a bit of practice and technique, you may be able to do better.

Other than that, it makes entirely good sense. Sportages are rugged and pleasant to drive and very practical too. One thing; the price seems a touch high, although that could have to do with there being a dearth of good 2009-2010 used cars around in general, as well as the very low mileage.

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Hi Peter,

Generally Tourans are pretty well made and the cabin in particular is very rugged indeed, a major consideration if you're going to be hauling kids around in the back of it. There are some reports swirling around on t'internet of gearbox issues, with some owners reporting that the DSG gearbox has failed when driving at speed, with literally explosive results. Other than that, it's the usual electrical niggles and some issues with the fuel injectors and pumps on the diesel engines.  As for value, if it's a petrol version, you might pick a 2008 model up for around €7,000-8,000, but if it's a diesel, expect to pay more like €11,000-12,000.

Let us know how you get on.

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Hi Colette,

We'll work from official figures here. Mazda quotes 4.3 litres/100km (65.7mpg) for the Mazda3 fitted with its 115hp 1.6 diesel engine. That applies to all versions of the five-door hatchback and four-door saloon the diesel engine can be had in.

Hyundai, meanwhile, quotes 4.1 litres/100km (68.9mpg) for its 110hp 1.6-litre diesel engine - in manual guise - so that car wins by a nose.

We wouldn't expect there to be much in it for the average driver though, as the Mazda has a little more performance (specifically torque), which means that the driver has to try a little harder in the Hyundai to achieve the same speeds.

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Hi John,

Yup, that seems like a good price, assuming the condition is good and all the service history is up to date. Make sure it's been in for a recall to have the steering system looked at and another one to reprogramme the engine control unit to stop it mistakenly kicking in to 'limp home' mode. 

A word of caution though; this car comes from an era when Mercedes-Benz was having a terrible time with build quality, and while the C-Class is generally well-made, we have heard reports of myriad problems, from small things like faulty door locks and handbrake linkages, to major items like engine injectors and ECUs. Buy carefully.

Let us know how you get on

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Hi John,

I'd go for the 1.3. True, it's not as grunty as the 1.7, but the 1.7 is a truly ancient engine, able to trace its roots all the way back to the early nineties when Isuzu first designed it and no-one in General Motors knew what the heck this de-hee-zel stuff was and they sure weren't going to put it in a car. The 1.3 by contrast was co-developed with Fiat in the early 2000s so is a much fresher, more high-tech design and it's a better engine all-round.

Both are a touch noisy compared with the best latest-gen diesels, but again the 1.7 is far worse in this regard and also has an annoying tendency to stall when pulling out of junctions. So go for the 1.3. A cracking little engine.

Hope that helps