Congrats on the new Rubi Jimmyjames. The red and black colour combo looks great. I'm sure your wife is going to love it!
Regarding gas mileage, I've got the 3.6L with the 8 speed auto in my Rubi and my commute to the office is less than 10 km's each way along Highway 7 (Yonge to Warden), so I'm getting right around 16 mpg on average (~17.5 L/100 km). On longer highway drives I'm getting 20-22 mpg (~13-14 L/100km) if I keep it below 120 kph.