I have had my new CBP TL-S with 6M for just over a week now and I am totally in love with it. My old car is a 1998 Maxima 5M and on my daily driving routine (of about 13 miles freeway and 10 miles side streets), I have been averaging 22 mpg. Possibly because I tend to accelerate hard and partly because I typically cruise at 77-80 mph on the interstate (depending on traffic). On my first tank with the TL-S (including 20 minutes idling at the dealer), I averaged about 24 MPG and so far on the second tank my average is between 25-26. That's pretty impressive considering that the TL is 450 lbs heavier and has a 100 hp over the Maxima, and not to mention just over 300 miles on the engine.