First tank (well 3/4 tank) - about 30% city and the remainder motorway at limit + 10/15 MPH as we were in a hurry. So under "EPA" (ECE combined really) by 20%, going to take some time to recover
On the plus side it handled 4 of us + dog + luggage in comfort through the monsoon that is Cumbria. About 500 miles in 2 days - which is why we bought it in the first place.
Negatives - it needs a service. The DPOs (Dreaded Previous Owner(s)) relied on the service indicator which is a "long life" service so oil changes 15-20K, I prefer 10K. Other one is a "shimmy" on the front left (I think) which could be (maybe) a tyre with a flat spot from standing around prior to sale (unlikely as it is still there after 600 miles or so), a wheel out of balance (there is residue from stick on balance weights which are missing) or something more scarily expensive which I'm trying not to think too much about.
So it goes to my local specialist who looked after Helga all those years ago tomorrow for a service and checkup.
Did some research on coasting with the auto. The book states that for the "V6 Diesel Automatic with Four Wheel Drive" version that for towing the car should be in N and not towed for more than 50km at more than 50 km/h due to lack of gearbox lubrication - so coasting at motorway speeds is out but a slow crawl type of coast in traffic should be fine. Not sure if the gearbox is lubricated with the engine running though - will go and ask elsewhere here.