Auto diesel clagging up at low revs?

[Maxr]

We have a Citroen C5 Aircross and a C4 coupe, 2 and 3 years old, both auto boxes and 1.5 130 hp diesels. The auto boxes in these often run the engines at about 1400 rpm at cruising speeds. Should I run them at higher rpm now and again to avoid the engines claggling up (like I used to with an old diesel Renault), or do we not have to bother with that now?

Thanks, Max

[mickthemaverick]

It never hurts to give any engine an occasional 'italian tuneup' on the motorway!!