Ahh I remember commenting on your S60 R back in the old thread.
Would you mind telling me more about your S60 R? I've just got an S60 not-R and am just curious about what might occur down the road.
So far I'm experiencing very poor gas mileage (16-17 MPG) and that's turning out to be quite expensive. But I still like it.
Sure... what model of S60 do you have? I assume it's the first gen and not the current one? Aside from the R there's the naturally aspirated base model, the 2.5T, and the T5.
Most of the issues I had with my car were specific to the R platform. It has extremely complex computer-controlled struts ($700 a corner) which like to fail, and the AWD system isn't great at handling the car's power, so the angle gear likes to fail too. Your car has conventional suspension and far less complex electrics.
That said, your fuel economy issue is interesting. Do you drive aggressively? Mostly on the highway or in the city?