Expert answer

Hi Michael,

If it's short trips and city driving then you're probably better off with the petrol model. It's significantly cheaper than the diesel version, which gives you plenty of budget to buy fuel and pay the slightly more expensive road tax. One word of warning though - from personal experience it can be almost impossible to move on a Mk1 petrol Qashqai when the market is so diesel-obsessed. Several people I know have had to take a bath on second hand value when it came to trading in a first gen 1.6 petrol Qashqai so you need to be aware of that. The new 1.2 petrol turbo version should by rights fare better because it's so efficient but with the market still being diesel mad, you need to be careful.

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Hi Noel,

All things being equal, it'll be the Merc that'll do better. I'm comparing the 2011 model years for both as I'm assuming you mean the previous generation of Mercedes-Benz ML-Class. 

According to the official figures, the ML 280 CDI automatic gets 30.1mpg on the combined cycle, while the Mitsubishi Pajero 3.2 DID automatic returns 26.6mpg. 

Hardly surprising really: the Mitsubishi has a five-speed gearbox compared to the Merc's six-speed unit, plus it's lugging around a heavier body and seven seats (the Merc's a strict five-seater).

Hope that helps.

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Hi David,

OK, if you're determined to go diesel and you need a reliable 60mpg plus then the only safe option is to get yourself a Golf BlueMotion. Your Polo plus your budget should get you easily into one, but you have to remember that getting good fuel economy is actually all about your driving style. We recently managed to get better than 60mpg out of a 1.2 TSI petrol Skoda Rapid, and that was with four big blokes on board...

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Hi Andrea,

Yes, it's a cracking idea. While the old Santa Fe isn't as sophisticated as the current one (hardly surprisingly) it's still an excellent used buy, very reliable and nice to drive. 

A figure of 100,000 miles on the clock shouldn't be a significant hurdle as long as the service history is all up to date. The basic rule of thumb is that four-wheel drive and automatic gearboxes always add to the fuel consumption. The auto box on that generation Santa Fe wasn't the greatest so I'd say stick with a manual and 4wd is down to where you live - if you regularly need rough road or slippery surface capability it's worthwhile, if you live in town then not much.

Let us know how you get on

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Hi Bernard,

Oddly, they're identical. According to the official figures both the 2001 1.8 turbo 150hp Golf GTI and the 2006 Octavia RS 1.8 turbo 180hp return 35.3mpg on the combined cycle.

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Hi Michael,

Depends which model you're talking about. The basic 87hp 1.4-litre petrol Astra returns an official 51.4mpg, while the 100hp version returns... Um, exactly the same. Meanwhile, the 140hp 1.4 Turbo Astra does 47.9mpg. If you mean the old-shape 1.4i Astra, that does an official 44.8mpg.

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Hi Paul,

Yes! And I'm not just saying that because I own a 2009 one... MINIs are generally pretty well made and reliable, just watch the 1.6 diesel engine for problems with the turbo and the injectors, and check the cabin carefully for signs of abuse or wear and tear. Clubmans are prone to developing an annoying rattle in the little 'ClubDoor' behind the driver's door, but there doesn't seem to be an easy cure for it. If the car cuts out under hard acceleration, check the diesel filter; it can clog and cause fuel starvation.

Expert answer

Hi Alan,

Electric Ireland charges a standard 19.28 cent per kWh as of Jan 20th 2014, according to moneyguideireland.ie. Other suppliers charge more or less the same although there can be a variation of up to 3c per kWh. 

In terms of what is charged to charge an electric car, the energy companies make no distinction. The plug points are downstream of your electricity meter so it's counted as the same juice that goes into your fridge, dishwasher or vacuum cleaner.

The total amount of tax charged on your kWh amounts to about 11 per cent, including both VAT and Carbon Tax, according to Sustainable Energy Ireland. 

So, why is this so much lower in tax terms than the 50-odd per cent levied by various charges on pump fuel? Simple: expediency. On the one hand, the Government must be seen to be encouraging the use and development of electric motoring. On the other, there is currently no simple and reliable way to distinguish between electricity being pumped into your car's batteries and what's being used to light, heat and wash.

That said, you can sadly and safely expect that to change, rapidly, if electric car sales ever take off in a big way. The Government has been very careful and canny about making sure that improving vehicle economy hasn't eroded it's annual €1 billion+ tax take from petrol and diesel sales, so if battery cars start eating significantly into that, expect some form of battery levy or electron tax to be enabled tout suite.

Expert answer

Hi Glenn,

Assuming you mean the 90hp model, then the official fuel economy was 64.2mpg on the combined cycle.

Expert answer

Hi Eileen,

Yes, very. Mazda updated the 2 in 2011 and made some detail improvements that boosted fuel economy while trimming CO₂ emissions. You should be able to manage better than 50mpg with a light right foot.