Hi Meremortal, it is disappointing that your first experience with your first "expensive" car has not been great, and I too would be greatly concerned with fuel in the oil.
After working in the automotive industry for the first 8 years after I left school, I learnt that it usually takes about 2 years from when a new model is released for all the major mechanical "bugs" to be removed from that particular model. I took my 2 year old Disco 4 in for service today for its 50,000km with no issues. , but saying that it was the end of a model D4 run out and I have been very fortunate with hassle free driving. Not that I do a lot of 4WDing but its been up and down its fair share of medium grade tracks, through rivers and carried the family around the country side without fault.
I just hope the rest of your ownership of your D5 will be more rewarding and hassle free.

