Hi guys, I have a 69 plate Lux Excellence. I've had it about 6 weeks. It's just done 4000 miles. I've done about 500 miles of motorway driving in it. BUT every week the car seems to perform a DPF regeneration! This ruins my MPG! Why is this happening? Is it normal? I've switched to Seat from a BMW 5 series diesel and I've had other diesel cars, never happened before? Thanks in advance.