I change my D4 3.0ltr every 10K about. Went a bit longer when I was on a trip and a bit shorter on another occasion as I was bored at home. Every 20K I get the independent (normally DazzaTd5) to change and do what's necessary otherwise.
I'm a bit of a fanatic about clean oil which may stem from the fact I worked in a place moons ago where the boss actually employed a bloke to just keep his race car running..... that bloke convinced me the cost of an oil change was well worth it for an engine/g/box/diff etc longevity. :)
Plus I used the free to me company oil .......
AlanH.

