🚀 go-pugleaf

  
  DL> Any speed higher than 55 mph MUST consume more gas!!! How much 
  DL> more might be questionable; but it has to be more unless 
  DL> someone has developed a machine that reverses the laws of 
  DL> physics.. You never get something for nothing in nature... 
  DL> 
  DL> To "push" a car faster, requires more energy..i.e. more gas; 
  DL> for the same car.. 
  DL> 
  DL> Mechanical and air friction increase with speed; therefor to go 
  DL> faster, requires more energy. . . . . .. 
 
Not true really.  Alot depends on the frontal area of the car,
The gearing and final drive ratio, and at what point the engine produces
the most power for the least amount of gas in RPMS.

I own an 1983 FORD Mustang with a 5.0 liter V-8 that gets best mileage
in 5th gear at about 2100 RPMS. (which with the current rear end or
transaxel is about 65 miles an hour.  Lower speeds, epecially 55 actually
reduce the gas milage about 2 miles per gallon. Testing was done with
a decent (non FORD) cruise control and with trips of over an hour at
a constant speed.  (Wife then girlfriend went to UVA, I lived in
Springfield)  20+ trips on Weekends.  In traffick and stop and start
is a different kettle of fish. Observed milage at 65 27 MPH, at 55 25 MPH.
It also could have been the HILLS on 29 and some inertia, who knows??????