I too have heard about high oil consumption on the VEA 2.0 litre engines. Its very much in line with the comments written above. I remember seeing an interesting video ( which may or may not be true - but expounds the comments above too)
https://www.youtube.com/watch?v=8yJoHgwiwio
Very glad I jumped and bought a new V70 D5 in Dec 2014.
Cheers
Bob