is that a S3 you got or 40Tfsi/E? Or 35Tfsi?I do the same 340 mile round trip most weekends. Pretty well all motorway. 65 - 70 on the way up ( traffic ) and 70 on the way back. Cruise control whenever safe to. Oddly - some days I average 36 mpg for the trip other days 45. For the life of me I cannot explain the difference.