hello and thank you for joining us.
tyre hum is something I can empathise with. I'm not sure what tyres come standard on the sport, but the bridgestones on my car really did hum. We seldom touch what is described in the book, and as for high revs while cruising, I believe mine runs pretty high at cruising speeds. After changing to goodtears, the road noise has been decreased, and the hum has disappeared. There is also a lot of information on the fuel economy on this page. I can't tell you how many times I told myself that I needed another gear. However, I am used to it now.