We're all gonna die !!!!.....faster...:o)
lol!
I regularly drive my BMW Z3 at 90-100 mph in Florida, for hours at a stretch. I could do that all day, and so can the car, no sweat. Around 120 MPH it gets a bit tiring, though.
Gas mileage? Who cares? The gas mileage nannies can suck my, uh, exhaust.