This explains a neighbour drove all the way to Cambridge and back to charge the car battery.
Bit confused there. The DPF has nothing to do with the battery.
Only Diesels have DPF's and they do not appreciate regular short trips because they do not allow the DPF to regenerate. Doing a weekly long run will not necessarily help since the DPF will only regenerate when the car decides it needs to, when we had a diesel with a DPF the regen could start just as we pulled onto the drive. Turning the engine off at that time would count as a failed regen and would be logged in the ECU, only a certain number are allowed before the car puts up a light on the dash and in some cases only a dealer visit and £££'s will clear it. Others give you instructions in the handbook (but many never read it) about what to do which normally involves driving for about 30 minutes between certain revs (normally in the 1500 to 2000 range) in a higher gear, the light should go out, if it doesn't it's a dealer visit.
When myself and the wife last had diesels we both did a decent daily commute, mine was about 30 miles, the wifes 40 miles and we never had an issue. When I went part time and next replaced the car I bought a petrol knowing that the reduced miles could have a detrimental effect long term. When the wife retired it coincided with her having a new car and again she bought a petrol for this reason.
Having owned modern turbo petrols now for 8 years I find that diesels are totally unnecessary for most car users. The turbo petrols actually drive better than the diesels and the fuel consumption is not much heavier. When you consider the price difference the time taken to recoup the extra cost of a diesel might never be reached if its a low mileage car and when you add in any DPF issues it simply does not make sense.
If I was still doing 20,000 miles a year i would probably still be driving a diesel but not at the OP's suggested 5000 miles a year.
And with regards to driving long distances to charge the battery that does not make any sense at all. A battery charger capable of charging all modern battery types on the car (as recommended by our Skoda dealer) cost me £23 recently and it works a treat. Looking at the daily energy consumption on the days I have used it there appears to be very little extra power used. Makes far more sense than making extra trips simply to charge the battery.
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