i have to agree with above, if you are not doing long journeys, the common rail engines really arent worth the extra hassle, my saab tid is doing the same mpg as my 1.8 focus at the moment, they dont heat up as quick as the petrol cars, and stop start driving really effects them, as for the DMF as said above, pretty much every car has them my friends tdci focus lasted till nearly 100k miles, my saab is on 157k on its original