Just returned from 2,300 km trip to Queensland and back, via the Putty Road and New England Highway, in our 2.2 HDi C5. Av consumption was 6.7 l/100km including city driving in Toowoomba and Brisbane. Best on one stretch was 5.5 l/100km. This compares with 8.8 l/100km in a C5 V6 on a similar trip in May. The car was a joy to drive and it was great passing service stations without the need to fill up, and I think the economy will improve with more kilometers on the clock. No rattles, squeaks, moans or groans from either car or driver!
Tom
Tom