Been doing some research as i'm knew to the audi scene and read that the 2.0 tfsi is prone to consuming oil. After reading this thought I should check mine and oil level half way between low and full. My S3 is on longlife service so had oil change a year ago so probably not too bad but my previous tuned focus RS never used any. What causes these engines to consume oil? Would an uprated PCV improve things? How much is oil for the S3 from audi?