Those T5s though...fueling them is a serious commitment!
The 2.5T in these P1 cars seems a fair bit worse on MPG than the older T5s in S60/V70 etc. That is why i always recommend the 2.0 petrol to those who just want a nice daily out of a c30.
The T5 is producing max torque from 1,500rpm which is almost overkill in car like the C30. The engine is a torque monster but you pay dearly with fuel costs.
The below video is showing an S60 2.5T AWD (208bhp stock) with 5-speed manual gearbox, at a 'stage 2' level of tune...the pulls in 4th and 5th gear are just plain silly.