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Hi Sandra,

Dodgy diesel can do a lot worse than just damage the fuel pump. I reckon, and sorry to be the bearer of bad news, you either need a complete strip-down and rebuild or possibly a complete replacement engine. That laundered diesel (and petrol) is nasty stuff, so avoid any fuel seller that appears to be even slightly less than kosher, especially in the areas around the North/South border. Sticking to the big brands may cost a few more cent per litre, but a new engine is a heck of a lot more expensive than that.

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Hi Aisling,

Yes they can, but they may not be the most cost-effective. If you're worrying about the diesel particulate filter in the exhaust getting clogged with soot and causing an expensive failure (and that can happen) then don't worry - a quick spin up and back the nearest motorway in a low-ish gear will heat the system up enough to let it burn off the soot and all will be well. Do it once a week for 30 minutes or so and you'll be fine.

The other issue is simple one of cost though. You will spend more money to buy a diesel car than you will a petrol and when you're only doing low mileage it's hard to generate the savings from fuel burn to make up the extra you've spent up front. That's why petrol makes so much sense for lower mileage drivers.

The thing is that the Qashqai can be had with a petrol engine, but it suffers much harsher depreciation when you buy it - so you're in a bit of a catch 22. Petrol is better for your driving profile, but worse for retaining value in this particular model. You may need to expand your search out to some other cars to make your sums add up.

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Hi Domas,

Go for the diesel. It's a reliable and solid engine, but over and above that it can be very, very hard to move a petrol-engined Qashqai on again. People want the diesel models, so those old 1.6s tend to be very difficult to sell. That fact should offset the slightly higher servicing costs for the diesel.

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Hi Michael,

If you want to go petrol then there are few better options than Volkswagen's 1.2 TSI turbo, and when it's fitted to the Skoda Octavia, you've got a near-perfect combination. Drive it gently, and you'll probably get very little difference in the overall fuel consumption compared to your old 407. That engine hasn't really been in the market for all that long, so it's a little hard to get a handle on whether or not there are any reliability landmines out there, but in general we've heard nothing bad. 

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Hi Joe,

The bad news is that 2-05 Santa Fes go for as little as €2,500, which means if you were trading it in you'd probably be offered as little as €1,000 to €1,500.

The good news is that yours has a full service history, which really helps, so I'd say your Santa Fe sits a bit higher up the value pile. If it's in perfect nick you might get €4,500 privately or around €3,000 to €3,500 on a trade in. 

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Hi Gerard,

Not the most exciting car in the world, but they're pretty solidly built. Be careful of electrical gremlins and any clonking noises from the suspension means a car is to be avoided. The diesel engines can burn rather a lot of oil so check the levels and beware of any rough running. The 1.8 petrol is adequate but 1.6 is underpowered and consequently very thirsty.

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Hi Mossie,

Assuming you mean the 1.25-litre petrol model, then yes, it has a timing belt and Ford recommends you change it every 100,000 miles (160,000km) or every 10 years.

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Hi Luke,

That light means that something somewhere in the engine that affects the emissions has gone wrong. It really could be anything and may not be really noticeable to the driver. It's still worth having the car checked with a diagnostics reader at some stage, as it could be doing long-term damage. Also, it won't pass its NCT with that light on.

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Hi Aoife,

I'd say you're just on the cusp of needing the diesel. It's probably down to what kind of mileage you do. If most of that 15,000km is driven on motorways or main roads then you could be just as well sticking with diesel. If you're mostly in town and suburbs, then it could be worth having a look at petrol.

Further reading:

Ford Fiesta review (1.0-litre EcoBoost petrol)

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Hi Dave,

Average annual mileage for petrol cars in Ireland is around the 17,000km mark. It's about 24,000km for diesel.