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Old 09-07-2009, 12:15 PM   #1
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Which is more wise

If I were have to run a 400km straight road, in terms of fuel efficiency. Which one would be better? No a/c, drag or whatever other factors involved.

Yaris going at
160kph/100mph = 2.5Hrs

Or
80kph/50mph = 5Hrs

The rule is to save as much fuel as possible.

Cheers
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Old 09-07-2009, 12:20 PM   #2
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Old 09-07-2009, 12:21 PM   #3
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??????

160kph for 2.5 hrs = road side suspension

What are you getting at here?
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Old 09-07-2009, 12:22 PM   #4
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Despite the road limit. 80?
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Old 09-07-2009, 12:23 PM   #5
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80kph/50mph = 5Hrs
If you are trying to use as little fuel possible, stick with the speed that nets you more mpg.
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Old 09-07-2009, 12:25 PM   #6
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Quote:
Originally Posted by Brentorius View Post
80kph/50mph = 5Hrs
If you are trying to use as little fuel possible, stick with the speed that nets you more mpg.
What's the speed I get the most mpg?
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Old 09-07-2009, 12:26 PM   #7
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Quote:
Originally Posted by caineroad View Post
What's the speed I get the most mpg?
45 mph
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Old 09-07-2009, 12:28 PM   #8
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45mph = approx 70kph

Thanks
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Old 09-07-2009, 08:40 PM   #9
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Quote:
Originally Posted by caineroad View Post
What's the speed I get the most mpg?
Somewhere between 35 and 45 MPH, depending on the road and weather conditions, and any elevation changes.
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Old 09-08-2009, 02:02 AM   #10
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You forget wind resistance. Higher the speed, the more it sucks.
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Old 09-08-2009, 12:52 PM   #11
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60kmh in 5th gear is the best fuel saver. But you have no choice but to go faster at the slightest incline.
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Old 09-08-2009, 12:56 PM   #12
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Quote:
Originally Posted by caineroad View Post
If I were have to run a 400km straight road, in terms of fuel efficiency. Which one would be better? No a/c, drag or whatever other factors involved.
It's quite impossible to exclude drag, or "whatever other factors [are] involved."

The correct answer has been given several times already.
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