Thanks for reply -- I am a bit confused - when you say run from full to empty. I thought it was bad to go below 1/4 tank as this prevents "regeneration"??
Actually difficult for me to risk an empty tank as nearest fuel station is 8 miles away and not open 24/7.
Re mileage -- it does get a longer run occasionally - eg 500+ miles ( each way) 3-4 times per year and up to 50 miles (each way) at least once a month -- but the latter is not necessarily on roads where I can maintain a suitable speed. So to keep up 3000 revs (for how long??) I would have to stay in low gear -- and possibly infuriate the traffic behind me on narrow roads
DPFs just sound like a pain in the neck -- wish I'd known more before I bought the vehicle --if I drive in such a way as to protect DPF and prevent myself expensive repairs -- I am also losing fuel economy and so using more fuel and hence more pollution????? Has anyone done any studies on the balance between pollution without DPFs and pollution through increased fuel consumption to prevent expensive DPF related repairs?