I have never encountered this problem. I'm sure the Focus must come with a DPF.
Diesels with particulate filters, dual mass flywheels and exhaust gas recirculation valves are best avoided. They only make sense for fleets that run them to 60,000 miles over two to three years on minimum maintenance, then sell them to the general public before any problems occur.
I've had an old-school diesel of one sort or another since the early '90s and they've been great to run - simple and reliable. My current van is a 2000 (Y plate) which has done 156k without a problem, but it's an old fashioned, non-turbo, unrefined old boat. I intend to keep it as long as possible!
Technical stuff about the DPF systems:
Frequently Asked Questions | Honest John
And if you're not convinced...
The biggest mistake of all is to buy a high mileage 3-year-old ex-fleet diesel car on the false assumption that diesel engines are robust enough to take the mileage and continue to offer fuel economy advantages. All too often, dual mass flywheels, diesel particulate filters, EGRs and turbos fail, potentially landing the car buyer with bills greater than the vale of the car.
Which? Confirms Hidden Costs of Running Diesel Cars | Motoring News | Honest JohnQuote:
The Which? study also considered reliability, taking information directly from the 2012 Which? Car Survey, which found that petrol cars are generally more reliable than diesels – both in the first three years of their life (the typical warranty period), and even more so between four and eight years-old.
But nobody has a crystal ball (that works), so you can only act on advice. Take it or leave it.
Diesels have their place, especially if you are up and down the motorway all day. However, around town, my comfy old 1999 3 litre Accord Coupe returns only slightly less fuel consumption than my previous MG ZT 2 litre diesel (which was running perfectly healthy
Large petrol engines tend to warm up extremely quickly and are efficient within minutes. The diesel was usually just getting to operating temp when I was pulling into the car park at work.
I got a 1.9 non turbo'd 306.
Great round town and brill on mways.
Pain in the ass to start in the morning but fun to drive.
Old is better imo.
Do that and fit a new battery if its over 3 years old and starting should be a doddle!
Also, change your fuel filter every 6000 miles. They're only a few quid from Euro Car Parts.