I've read some site say 55 or 60mph. What about 40, 45, and 50? What is the real phyics behind this? I was thinking that driving at the lowest speed in the highest gear (automatic transmission) is most efficient.
2007-10-20 01:59:15 · 6 answers · asked by Thomas 2 in Cars & Transportation ➔ Other - Cars & Transportation
the lowest mph my car can get in the highest gear or overdrive is 45mph. If my speed drops below that it will downshift.
2007-10-20 02:14:46 · update #1
ADD one or two more things lowest RPM Highest Gear and "least throttle angle." Low rolling resistance tires "aerodynamic body shape" small frontal area. Highest fuel economy may be as slow as 35 mph in a truck where a Smooth sports car may manage 50 to 60 mph and get the best fuel economy. MY 2006 GTO 6.0 Liter V-8 loves 65 miles an hour and returns 25 miles a gallon. 23 miles a gallon with the windows down. Wind resistance. Keep your car slippery clean and waxed. Tires at pressure.
2007-10-20 02:20:17 · answer #1 · answered by John Paul 7 · 1⤊ 1⤋
The slowest speed possible in the highs gear you car has. Usually that's about 35 to 40 mph in most cars
2007-10-20 09:12:41 · answer #2 · answered by Anonymous · 0⤊ 2⤋
it is generally accepted that a constant 56 mph is the most ecnomical speed to travel. it as a much to do with keeping your foot off the acclerator and getting the best performance for the miles travelled
2007-10-20 10:39:44 · answer #3 · answered by Anonymous · 0⤊ 1⤋
I heard 50.
2007-10-20 09:03:11 · answer #4 · answered by Anonymous · 0⤊ 1⤋
you r right..high gear and as slow as u can go...BUT its not practical....around here...SW Virginia...limit is 55 and u beter go 55 or people will run u off roar trying to pass
2007-10-20 09:05:46 · answer #5 · answered by Anonymous · 0⤊ 1⤋
0 mph :)
2007-10-20 09:06:41 · answer #6 · answered by Anonymous · 0⤊ 2⤋