May I introduce myself as a new Civic owner. I bought 2.2 CDTi on the 1st March 2007. Initial impressions are all good. Very impressed with the cars combination of performance with economy. I note that the service interval has now been extended to 12500mls. Checking on the Castrol web site the recommended oil is now Castrol Edge Diesel 0-30 C3 designed to protect the particuate filter. I bought a litre from Halfords as a standby as the level on the dip stick is gently falling, hopefully it will reduce as the miles go on.