Cj987,
This is a statistic of one 240D only but the Millers Analysis for my MY18 DS 240D after 9,500 miles on this oil charge indicates a dilution of 6%. "Critical fuel dilution identified. We would advise this oil is changed". My experience would suggest that, irrespective of the rated horsepower an Ingenium engine is an Ingenium engine !
Call me old fashioned, but I changed the oil after the first 1000 miles driven and again changed and flushed at 10,500 miles driven. I was curious to see the condition of the oil / dilution %. No "Service required" messages on the screen but I now have N289 outstanding showing in TOPix. Renewal of oil and filter logged as Arduous Interim Service on OSH. Driving style is 30 mile minimum (home to Aberdeen) but generally 100 - 200 miles (home to Dumfries). I mostly use Premium fuel, no ECO, no S/S and mostly Sport mode, mpg is circa 38 - 42 with 2 up and overnight bags, and average speed cameras notwithstanding, even on the M90..............