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Hi John,

Yes, I'd say you're onto a good one there. Obviously, a well used 14-year old Astra isn't going to come with a bundle of trade-in value attached, so I think the price looks pretty fair for the Octavia, especially given the low mileage. Honestly - we see press cars with higher miles than that!

As for the petrol/diesel side of things, I think you'll be fine in the 1.2 TSI. At 11,000 miles a year you're well within the bracket to keep burning petrol rather than switching to more expensive diesel (more expensive to buy the car, not the fuel of course) and the good news is that the 1.2 TSI engine is exceptionally frugal. In fact, I once drove one for 200km before I realised that it wasn't diesel, so slow moving was the fuel gauge. In my defence, it was late and I was tired...

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Hi Rasti,

I'd say that kind of mileage puts you just over the tipping point for diesel, but if you must insist on petrol then go for the 1.6 - that 1.4 is so underpowered that you have to work it hard to get any performance out of it, and that really hurts the fuel consumption. As for buying privately, just keep your wits about you. The Octavia is a solidly reliable and well made car, which lowers the risk, but don't accept anything without immaculate paperwork and a proper, fully-stamped service history. None of this my-brother's-a-mechanic-and-he-looked-after-it rubbish. Worth getting a history check (from the likes of Cartell.ie) and maybe an AA inspection too. Be especially wary of cars with outstanding finance still owing on them.

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Hi Martin,

There's little else worse than getting unexpectedly bad car repair news, and we all know how it feels. Now, as you point out, you have, essentially, two options here. One is to trade in the car without the work done and get something new. Now, that's a very tempting option and one that would at least put you back under a warranty and give you reasonably predictable monthly repayments etc, all of which is good news.

The thing is though that your Mondeo is only six years old and to my mind there should be an awful lot more left in it. I would be tempted, especially as you've also just upgraded your wife's car, to take the €3k on the chin and keep yours going for a while yet. You're at a point in its life where the value isn't going to sink all that much more anyway, so keeping it an extra year or 18 months isn't going to have an enormous impact - with the age and mileage already on it, it's going to be at the lower end of the value scale anyway.

One thing worth considering: rust doesn't happen overnight. If, as you say, this car has always been serviced to schedule with the same dealer, ask them why the problem wasn't flagged up sooner. You may be able to use that as a bit of a stick to beat the price down a touch.

Let us know how you get on

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Hi Philip,

It varies from station to station and supplier to supplier, but the standard for all Irish fuel is E5, which allows for (but doesn't specify) a five per cent mix of bio-derived ethanol in petrol. Ask at your local station to be certain though.

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Hi Jon,

I'm afraid this sort of thing is nigh on impossible to diagnose from afar as there are so many factors at work. Here are a few things to look at, but really, you need a mechanic to take a look:

- Hook it up to a diagnostic machine and get any error codes - that could save time

- Perhaps the glo plugs aren't working - they'd be needed in this cold weather (if it's diesel)

- Maybe the fuel tank pump isn't working. Turn the ignition on and you should hear a buzz from under the rear seats

- Is there sufficient fuel in the tank?

Best of luck with it - let us know how you get on

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Hi Ken,

It's difficult to know from afar, but there are several things that will affect this - assuming you're seeing a reduction in your car's economy:

1 - Tyre pressures need to be within specification

2 - Wheel alignment must be correct

3 - Perhaps the air filter and/or fuel filter is dirty and needs replacement

4 - Are you carrying extra weight in the boot?

5 - Is the rear window demister on permanently? 

Go through all of those things, starting with those that cost nothing to check and you should find savings. If not, then get the engine are car serviced and that might help. Perhaps a brake is binding.

Let us know how you get on

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Hi Joe,

I presume you're asking this from a classic car point of view? The bad news is that pretty much all petrol sold in Ireland conforms to E5, or in other words has been blended with a five per cent mix of bio-source ethanol - alcohol derived from plants. The good news is that there's no evidence that running an older engine on E5 has any unpleasant effects. If the car has already been updated to accept unleaded petrol then you should be fine. The only issues arise when the car is left standing for a long time with the fuel sitting in the tank. Then the ethanol and petrol can separate, which can cause corrosion in the tank and/or fuel lines. 

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Hi Shane,

If it's a small petrol hatch you're looking for then I think the best options are either a Ford Focus with the 1.0-litre EcoBoost turbo engine (the 100hp version is the sweetest) or either one of the three Volkswagen Group hatches (Golf, Skoda Octavia or SEAT Leon) with the brilliant 1.2 TSI turbo. Both engines, if driven gently, should yield close-to-diesel fuel economy.

Incidentally, your point about higher seats being easier to get in and out of for elderly drivers is well made. It might be worth checking out something nearly-new along the lines of a Golf Plus or Ford C-Max in that regard.

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Hi Stephen,

I agree it can be a little annoying on an automatic car, as you can't decide when you do and don't want it to happen at any given moment. I'm sure you're aware that there is a button on the dashboard to disable it at any time, but it sounds like you'd rather disable it completely. Sadly, there's no legitimate way to do this. The car's official CO₂ emissions and fuel economy figures rely on this feature, so even if you find a fuse or relay to remove for the system there will at the very least be a warning light on in the dashboard - and it may even go into 'limp home' mode.

By way of explanation, the 'combined cycle' is a relatively low-speed and short duration (standardised) test cycle all the car makers adhere to for their CO₂ and fuel consumption figures. Stop-start makes a big difference for this as the car is idle for considerable amounts of time. In the real world, this tends to happen only in slow traffic or in town with lots of traffic lights. You would see a saving in those situations, but in reality it'll be small.

Sorry not to be of more assistance.

Expert answer

Hi Gerry,

You've picked three difficult cars to choose between. Obviously, both the Hyundai and Kia are essentially the same car beneath the skin, and both come with temptingly low prices and long, long warranties. The SEAT's three-year warranty looks a bit brief in comparison, but then you are buying into a car with excellent reliability and high quality, so there's that.

You've also got an odd combination of relatively high mileage, but in an urban location, which suggests that you won't be working up enough speed to generate exhaust heat to keep a diesel particulate filter (DPF) clean. With all that in mind, I think your best best might be a Leon 1.2 TSI petrol. It's a cracking engine, nearly as good as a diesel on fuel economy, but with no nasty surprises waiting in the exhaust. Both the Hyundai and Kia are excellent cars, but both are best experienced as diesels.