What would be THE most efficient National Speed Limit for US vehicles, and how many barrels of oil per day would it save?
by 
atpcliff
ANSWERS: 2
-
At an average speed of 41 MPH (daily commute;75% highway), my wife's car gets 29.2 MPG. At an average speed of 70 MPH (interstate; steady speed), my wife's car gets 34.5 MPG. At an average speed of 41 MPH (daily commute;60% hilly highway), my car gets 23.5 MPG. At an average speed of 70 MPH (interstate; steady speed), my car gets 27.1 MPG. It is HIGHLY vehicle dependent, but experience shows that lower speed are less efficient than you'd think. As for the number of barrels, I am at a loss. There are too many Yukons, Expeditions, and H2s on the road for me to think that it wouldn't save a bit, but I don't know the MPH/MPG correlation on those vehicles.
-
These results are bogus! Nobody use them for practical purposes. Please try to use a sound testing process by changing only ONE variable at a time between test runs, and ACCURATELY calculating results. A more convincing answer would be: "Driving on the same, flat, country road at night with no interfering traffic, over a 5 mile stretch, and using cruise control to maintain a constant speed, my car gets: W mpg driving at 30 mph X mpg driving at 40 mph Y mpg driving at 50 mph Z mpg driving at 60 mph Now consider your method of calculating mpg. Is it a trip computer? Trip computers can have a huge offset! Is it the miles traveled divided by the gallons shown on the gas dispenser gage at the gas station? This would be better, if you averaged several tanks and filled up all the way at the same gas station.
RELATED QUESTIONS
Copyright 2023, Wired Ivy, LLC