Reading the original post just about caused my heart to skip a beat. I just bought a brand new 4Runner (yes I've seen the abbreviation T4R, I just don't feel worthy enough to use it yet) yesterday. Total of 439 miles on it now, 234 when I picked it up yesterday.... I drove approx. 90 miles today to and from my home town at 80mph the entire 90 miles. I quickly went and read the manual, and here is a pic of that page:
To me 80mph is not a high speed at all. The ECO light was even on while I was driving at 80mph. I did drive it a little hard on some country roads, but only for a very brief period. Feeling okay about it now. I wish my dealer would have pointed out there was a "break-in period". This is the first brand new car I have ever owned and I'm wanting it to last me indefinitely. I'm hoping to drive it until it's old, then turn it in to an off-roading vehicle.