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Originally posted by TheHunted
Every mph over 65 you lose 1 mpg. Do the math and see how much money you are just giving away to the likes of Exxon. I drive a 97 Lesabre and average 33 mpg. We do have the power to control this.
[edit on 15-8-2008 by TheHunted]
Originally posted by TheHunted
Every mph over 65 you lose 1 mpg. Do the math and see how much money you are just giving away to the likes of Exxon. I drive a 97 Lesabre and average 33 mpg. We do have the power to control this.
[edit on 15-8-2008 by TheHunted]
Originally posted by TheHunted
reply to post by cautiouslypessimistic
I was willing to debate until your claim of 55 mpg at the speed of 90 mph. I will say no more....
# Slow down. Air resistance goes up as the square of velocity. The power consumed to overcome that air resistance goes up as the cube of the velocity. Rolling resistance is the dominant force below about 40 mph. Above that, every mph costs you mileage. Go as slow as traffic and your schedule will allow. Drive under 60-65 since air grows exponentially denser, in the aerodynamic sense, the faster we drive. To be precise, the most efficient speed is your car's minimum speed in it's highest gear, since this provides the best "speed per RPM" ratio. This is usually about 45 to 55 miles per hour.
Originally posted by cautiouslypessimistic
Originally posted by TheHunted
reply to post by cautiouslypessimistic
I was willing to debate until your claim of 55 mpg at the speed of 90 mph. I will say no more....
I was at about 5500 rpm. Don't beleive me, go do a constant 90 in a high efficiency 4cylander. Given, with hills, temp, etc it can vary, but you will MOST DEFINATELY get a large bump in your mileage.
As I said before, it has way more do with RPM than speed. A 4cylander burns almost the exact same amount of gas at 4500 rpm in 3rd gear as it does at 4500 rpm in 5th. But, in 5th at 4500 rpm, you are covering ground in a much faster time than you would be in third, therefore you are getting many more miles for each gallon burned.
As I also said before, constant accelerating and decelerating is what kills gas mileage.
You are mistaken.