75 Speed Limit - How Fast
We are heading to Utah from NC. I-40 most of the trip with speed limits at 75mph along much of the way. I do NOT go that speed when pulling. What do you guys do? ETA: Carlisle HD Radials rated t...
Forum Discussion
Edd505 wrote:Lynnmor wrote:
Anyone that says they get their best mileage at 72 MPH is not in touch with reality. Since aerodynamic drag increases dramatically as speed increases, it is impossible to reverse basic laws of physics. Slow down AND grow up.
Another city dweller that lives in an area your lucky to maintain 55. Go west I know my vehicle & worked numbers for many years an know where my vehicle runs best. Diesels love to work and work best pulling loads, that's why you never see gas long hauls. 72mph the engines loafing at 2000 rpm, right in the power range:
Per Ford:
Horsepower: 450 hp at 2,800 rpm
Torque: 935 lb?ft at 1,600 rpm
Jump in your Prius and drive on.
I wish my diesel got decent mileage at 72. Been there and tried that and didn't work out too well. My best mileage is 63-65
Mike
