It would seem from that article the way to prevent engine damage would be to keep up with servicing and use the correct oil. Nothing unexpected there. That leaves a regular check on that turbo nut and the jobs a good 'un. There's not a motor out there without it's problems if they are not looked...
You'll get a 2010 (maybe even a 2011) Peugeot 207 SW 1.6 diesel for £5k. My mate's a taxi driver and he loves it. Probably amongst the best diesel engines around. A reasonably low tailgate lip for getting your dog in and out of too. Plenty of room in the back of one of those even with a...