Expert answer

Hi Nick,

It might be tempting to go with the newer car, but the Peugeot engine has what's called a 'wet belt' and these can be problematic. Unless it has had more oil changes than is recommended, we'd shy away from this car. Shame as it's otherwise nice, and newer than the Fiesta.

Still, the Fiesta (and we're assuming you mean the 80hp non-EcoBoost one) is a great choice. The Peugeot and Ford are contemporaries when it comes to safety equipment and standards with the Fiesta slightly better anyway.

All in all, if those are the two cars on your shortlist, we wouldn't hesitate to say go for the Fiesta.

Expert answer

Hi Frank,

It's the timing belt itself that you've heard about most likely as, on some versions of the 1.0-litre Ford EcoBoost engine, it is what's called a “wet belt”. That means the timing belt actually runs in oil, where most timing belts do not.

Ford isn't alone in having problems with them. The rubber in the belts can degrade due to many issues including use of the wrong engine oil and impurities in the oil as it gets older.

The good news for you is that, while earlier examples of the 1.0-litre EcoBoost engine did use this setup (though not all), and Ford dropped it from 2022 on, the MHEV engines always used timing chains instead and they should therefore be more robust.

However, even those later engines use a rubber belt to drive the oil pump and that still runs in oil so potentially has all the same issues. It is too new for those problems to have come to light and Ford believes it is designed for the life of the engine because it is under far less stress than the timing belt was.

All we can advise is that you carry out oil changes a little sooner than recommended and that you always use the correct specification of oil.

Expert answer

Hi Aubril,

The Focus estate in general is pretty decent, but the 1.8-litre diesel engine was not Ford's finest hour and unless it has verified low mileage and/or a detailed service history showing regular oil changes, it's best to look for an alternative. The 1.6-litre diesel is a far superior engine from Ford, for example.

Expert answer

Hi Patrick,

That is very high mileage of course, but many diesels are quite capable of it so long as they're maintained properly. Look for a detailed service history covering oil changes in particular, and on-time timing belt changes as well. 

Even so, there's no doubt that a car with that mileage on it will require mechanical maintenance. I'd only consider such a car if the price was exceptionally low in comparison to other examples with lower mileages. 

Expert answer

Hi Colette,

Unless you're covering huge mileage, that seems way too often to us. If a Honda dealer has told you that, you should ask for clarification as to why, as, other than high-mileage, it would be normal for a new car such as that to have an oil change once a year - or when the built-in service indicator suggests it's needed.

Expert answer

Hi Jonathan,

Timing chains are designed for the life of the engine, so they do not come with a scheduled change interval. Make sure the oil changes are regular to keep the chain in good condition. 

Expert answer

Hi Kevin,

There is rarely ever such a thing as a scheduled timing chain replacement - they're designed to last the life of the engine. So long as you stick to recommended oil change schedules then we wouldn't expect the ix35's chain to stretch or wear excessively.

Expert answer

Hi Jeff,

That car has a timing chain so should need no maintenance other than timely oil changes.

Expert answer

Hi Rob,

They're a pretty solid car actually. Check the service history carefully and make sure that the 1.6 HDi engine has had regular oil changes with high grade oil. Black smoke means either a blown turbo or at least turbo seals and check the air conditioning to make sure it's chilling the air properly. 

Expert answer

Hi Gerry,

It's very difficult to assess such things from afar I'm afraid. It could be any number of things. Basically it comes down to spark, fuel and air, but of course, electronics also come into it, so a sensor could be faulty as well. The best bet is to bring the car to a good local mechanic to have a look.

Hope you get it sorted soon.

Expert answer

Hi F D,

There does seem to be an issue with the turbo- and supercharged engines involving the timing chain and it seems to be because Volkswagen tried to stretch the service intervals too far. Now, your A3 may not have that particular engine, depending on the year and the engine power. The lower power 122hp version of the 1.4 TSI didn't have a supercharger, just a turbo so is simpler and doesn't seem to suffer the same issues. The more recent 150hp version also does without the supercharger, so the best thing to do is not panic - if you're concerned about the car, take it to your dealer, have it inspected and maybe insist on a more frequent oil change.

Expert answer

Hi Stu,

Not necessarily. Mileage is, to be honest, more or less irrelevant. It's all down to the condition of the car and its history. If it comes with a full service book, showing every stamp and receipt, and it's clearly been looked after and cared for then it should be fine. 

Just check to make sure that all the electrics are OK and that the cabin doesn't show obvious signs of abuse. Might be worth getting someone to look at the engine too - that 1.6 diesel has a fragile water pump and is prone to 'sludging up' with deposits of old oil. Worth getting it flushed and have the oil changed.

Expert answer

Hi Matt,

Check the steering and suspension for any sagging or any nasty knocking noises, and make sure that the car has been back in to have an engine ECU upgrade - that should have been carried out as part of a recall. Other than that, the engine needs regular checks for oil level and regular oil changes too. If that hasn't been done, the car has been neglected and you should leave it.

Make sure it comes with a full service history.

Expert answer

Hi Mary,

I'd tread carefully where the Multitronic box is concerned. While the serious issues that plagued it pre-2006 have been mostly sorted, it's still not trouble free. Oil changes are needed at regular intervals if it's to be kept in good order. 

I do reckon, if funds allow, you'd better off going for the S-Tronic gearbox, which seems to have a much stronger reliability record.

Expert answer

Hi Robert,

Yes, they're pretty good. We've heard no major reports of serious issues with the current-shape Focus and that 1.6 diesel is long-lived and has seen service in various Volvos, MINIs, Citroens and Peugeots. Just make sure that it gets a regular oil change and that you use a high-grade synthetic oil. 

Expert answer

Hi there,

There are not generally any set change intervals for timing chains. If a car is well-maintained (in terms of oil changes etc.) then it should never have to be changed really.

Expert answer

Hi Meeka,

I personally bought a 2006 Volvo V50 1.6 diesel, which is the estate version of the S40 so I know a little about them. I'm assuming that S40 is 1.6 diesel as well, as most are from that year. The most important thing about this engine is that it is used regularly at motorway speed (to burn off deposits on the diesel particulate filter - DPF) and that oil changes are also regular, and done with the right oil. Insist on a full service history and the more reputable the garage the better.

Make sure the DPF warning light is present when the ignition is turned on and that it then goes out soon after the car is started up. If it's missing completely it means there's a reason someone removed it - walk away.

Other than that I found the car to be very well equipped for the price, making it much better value than a similarly priced Focus or Golf from the same year. It's also more spacious than those cars - though not by much.

Let us know how you get on

Expert answer

Hi Aoife,

We asked Toyota Ireland what it thought would be reasonable oil consumption, and though you haven't told us the age of your car it was suggested that a rate of a quarter litre of oil per 1,000 kilometres was normal. Toyota suggested that, if you suspect there is an issue, bring the car to a dealer and as for an oil consumption test to be carried out.

Hope that helps

Expert answer

Hi Rosemary,

According to the official figure, you should be getting 33mpg. Bear in mind though that this is almost a ten-year old car, so its performance in terms of fuel economy may have tailed off. Nothing a good service and oil change wouldn't fix though, along with some decent new tyres.

Expert answer

Hi John,

Great car, the Mazda6, and lovely to drive. Two things though: you may well find that 2.0-litre petrol to be both a touch thirsty and, consequently, very hard to move on again come resale time. And at that mileage it's imperative to make sure that the car has a full service history and that major maintenance work such as timing belt replacements and oil changes have been done.

Expert answer

Hi Albert,

It's a timing chain, so theoretically no maintenance necessary once you stick to recommended oil changes.

Expert answer

Hi Ian,

If nothing else, you need to adhere to manufacturer servicing schedules to ensure you don't invalidate your warranty. If you don't trust your local dealer then contact Opel directly, though these figures should be in your owner manual as well.

Besides all of that, we'd thoroughly recommend servicing modern diesel cars regularly, as the car makers often push the service intervals out to appeal to fleet buyers. Regular oil changes in particular are a very good idea.

Hope that helps

Expert answer

Hi Tony,

OK, there are a couple of issues here. One is that a trawl of the Internet forums, especially in the UK, seems to indicate that there is a common problem on the N47 2.0-litre diesel engine whereby the timing chain can either fail or jump its sprockets. Either way, you're looking at an engine failure and a need for replacement. Not a trivial matter. 

However, BMW has not issued a recall or any specific advice in this area, which may indicate that there has not been a significant level of these incidents. It's easy to accuse a car company of ignoring a major problem but actually that's rarer than you'd think and it's all to easy to get into a froth of indignation from just reading complaints on the internet.

That being the case, we'd simply advise caution. There are some very good independent BMW specialists out there (such as http://www.bloomfieldgarage.ie/) and it might be worth getting in touch with them for more detailed advice.

Also, insist on full service history with these cars, paying particular attention to oil change intervals.

Expert answer

Hi Dawn,

Going on personal experience, I'd say that the C4 Picasso would be the most economical of the bunch. All of them should be able to get between 45-50mpg, and I'd say the C4 should just nudge above 50mpg. That said, you have to remember that what dictates fuel economy more than the car is your driving style. Practice driving with light throttle openings, anticipating further ahead and always using gentle control inputs and you should be able to get that economy figure improved. Also, take any excess weight out of the car, make sure the engine is serviced regularly and the oil changed often and get a good set of low-rolling resistance tyres, and keep them at the right pressure. It all helps.

Expert answer

Hi Eddie,

You've not told us what engine you mean, so here's a list of the most common engines. Note that timing chains don't have a change interval and they should last the life of the engine if scheduled oil changes are carried out and all else is well.

 - 1.2-litre petrol: timing chain
 - 1.3-litre CDTi diesel: timing chain
 - 1.4-litre petrol: timing chain
 - 1.6-litre petrol (both turbo and NA): timing belt - change every 150,000km or 10 years
 - 1.7-litre CDTi diesel: timing belt - change every 150,000km or 10 years
 - 1.8-litre petrol 125hp: timing belt - change every 90,000km or six years
 - 1.8-litre petrol 140hp: timing belt - change every 150,000km or 10 years
 - 1.9-litre CDTi diesel: timing belt - change every 150,000km or 10 years

Expert answer

Hi James,

As discussed via email:

That generation Audi A6 is in general a reliable car, but not fault-free. Some owners have had no problems, while others have been plagued. The Multitronic transmission is not renowned for being the most trouble-free, though units made pre-2006 have the most problems. Also, the gearbox's fluid should be changed at 55,000 and 115,000 kilometres (or 35,000 and 75,000 miles) so the car you're looking at should have had two changes by now. Check that it has and then look in detail at how the gearbox works. Does the 'PRNDS' indicator on the dash flash? Is there hesitation? Is it easy to get reverse?

No matter what turbodiesel car you look at you'll hear of turbo problems from some owners. Most of the time it's likely to be due to poor oil maintenance. So check the car's service history in terms of oil changes and that the oil level itself is right. They do use a bit of oil.

While you're checking out the car in detail, make sure the air conditioning can produce freezing air in just a few minutes, as these have been known to fail.

I'm probably making this sound worse than it is! I'd buy an A6 for myself - it's a good car - you just need to know what you're looking for and not get caught out by one of the few badly maintained examples out there.

Let us know how you get on.

Expert answer

Hi Jackie,

We would expect a car's brakes to be thoroughly checked during a service for sure, though whether they warrant changing really is up to the mechanic doing the job. As that noise was not there when you bought the car it's fair to assume there was no issue with the brakes then - though clearly the pads didn't have much left on them. It's good that they're doing it now for you, even if the person you are dealing with is dismissive.

It's quite poor that the mechanic wouldn't find out what the code 82 was about, but there you go. The Insignia's engine management system monitors several parameters such as number of cold starts and engine speed and calculates when you need an oil change. If you use your car more frequent short journeys rather than longer ones then it may require changing earlier. Many people ignore this read out and just change their oil according to mileage or time, but the official word is to stick to what the engine management computer says. Just make sure the garage resets it again for you.

Last point: I wouldn't expect the garage to pay for this oil service. If they do, it's a bonus!

Hope that all helps put your mind at ease.

Expert answer

We checked with Mark from www.micksgarage.ie and he told us, "One of the guys here has worked as a service advisor and warranty manager in the past and can confirm that if you buy genuine service parts and service the car yourself, the warranty is unaffected. Also, for those looking to undertake the jobs themselves, the Haynes website has some useful videos on oil changes, filter changes and spark plugs etc."