otrfun wrote:
My current truck is capable of getting it's rated EPA highway rating of 18 MPG at 75 MPH--which just happens to be the same MPG I got with the Ecoboost at 80 MPH--18 MPG. Yes, slightly better, but certainly not significant. Anyhow, I'm still happily driving my current truck with a bit less torque at 2k, but with a lot more jingle in my pocket--for now.
Out of curiosity, what is your current truck?
I just don't know if I can imagine anything truck-shaped and 6000+ lbs getting much better than 18-19 at high freeway speeds. Aerodynamics, you know ... but I hope I'm wrong and someone can engineer it. Maybe the Ram EcoDiesel will do it.
But I just know that my last few trucks all seemed to drop off quickly after 70 mph. My 2010 Suburban will pull down around 21 mpg, with a best ever of 21.5 mpg, under the right conditions (cruise set at 60-65 on the state highways, such as when I drive from SLC to Moab or Albuquerque), and my Duramax would be around 19.5 mpg for the same trip. But extended freeway driving in the 75-80 mph range puts me in the 17-18 mpg range for both of those trucks.
