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Topic:
Obama: Fuel-efficient cars an answer to gas prices [Locked] |
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
How you actually drive the vehicle has an impact on your mileage.
/hth
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I know what you're trying to do but you're just sailing another failboat over the falls. - imaloon1
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Szerek  Posts: 338
Registered: 2000-8-8 09:26:09
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Blue_arrow posted:
Szerek posted:
I drive a 2008 Ford Focus. It is a base care with a standard transmission. I average 42.2 MPG around town and on the highways. I calculate my MPG per tank with two methods. 1) with a ScanGauge II and 2) with a pen and paper and they are always within .4 mpg of each other. I paid $12,400 for the car in '08. It is more cost effective than any Prius because it takes A LOT of gas to make up the nearly 10k in price difference.
Yes, I have a small car, but I only have to fill the tank once a month or so these days.
Maybe what Obama needs to do is look at why we don't have some fuel efficient cars available to us in the US, like:
http://gas2.org/2011/04/06/the-67-mpg-diesel-focus-econetic-the-u-s-can%E2%80%99t-have/
really ? 42.2 MPG around town and on the highways
http://www.fueleconomy.gov/feg/noframes/24824.shtml
2008 Ford Focus
4 cyl, 2.0 L
Manual 5-spd
Regular Gasoline
24
City
35
Highway
Yeah, really. You can really alter you MPG by learning how to drive to conserve fuel. For example, you can increase fuel mileage by about 10% by running your tires at max sidewall air pressure rather than what the manufacturer suggests for comfort. Not only will that save you on gas, it will give you longer life on your tires as well.
http://ecomodder.com/
Also google hypermiling techniques
My best fuel milage was coming home from my parents house last summer. It is a 36 mile trip and I managed 68.4 mpg in my focus on that trip.
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reesescups  Title: //Captain America
Posts: 2,537
Registered: 2003-5-26 14:45:53
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Mangler_X posted:
reesescups posted:
Fuel efficiency is the answer to high gas prices.
Couple years ago I had to replace my SUV. I did my research and I replaced my SUV with a trail rated jeep that gets double the gas mileage of my previous jeep.
I can't tow with it - but other than that, it's capable of doing all the off-roading I was doing with my previous jeep and I spend half as much on gas. Oh and the vehicle was less than 20k out the door.
I am super duper awesome!!!
You got a Liberty didnt you? Its the only Jeep that gets even decent gas mileage
My 2005 Wrangler gets 19mpg HWY and I have after market intake and exhaust to improve over factory.
Gas Mileage sucks in Jeeps no matter what you do.
I wish to god someone would make a diesel engine for Jeeps that doesnt require a major refit and all new drive system so I could go Bio
On a side note, you can tow with a short wheel based Jeep. Just tow less than 1200lbs or have a breaking system on the trailer.
Nope went with the Patriot stock with all the off-road upgrades. I'm such a cheap bastard I even have manual doors and locks... Then again by 'trade' I am a Failure Analysis Engineer and I know auto locks and windows are some of the first things to break down in a off-road vehicle...
/shrug
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reesescups Title: //Captain America
Posts: 2,537
Registered: 2003-5-26 14:45:53
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
paulg_68 posted:
/serious
Yeah - we know...
Which just makes it all the more entertaining...
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"man up, you wimp." - Groucho48
"I'm not racist at all." - dae_trist
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reesescups Title: //Captain America
Posts: 2,537
Registered: 2003-5-26 14:45:53
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Eager_Igraine posted:
How you actually drive the vehicle has an impact on your mileage.
/hth
Yep, maintenance and driving habits - you can see huge improvements in MPG just by maintaining your vehicle and not being a raging douche behind the wheel!
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"man up, you wimp." - Groucho48
"I'm not racist at all." - dae_trist
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Groucho48  Posts: 821
Registered: 2003-10-22 03:00:14
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Paulg was talking about mpg but was really interested in gpm. I'll agree that, for all sorts of purposes, gpm is the more useful figure, but, that is not what his first statement said.
"For every vehicle that gets 20mpg you need 3 other cars that get 100 mpg in order to average out at 50 mpg."
Now, if the statement had been set up..."A car that gets 20 mpg travels 100 miles. How many mpgs would three other cars need to average, over 100 miles, to bring the overall average up to 50 mpg", he would be correct.
In a discussion of the harmonic mean, I saw this...
Quote:
Problem 1
A fellow travels from city A to city B. For the first hour, he drove at the constant speed of 20 miles per hour. Then he (instantaneously) increased his speed and, for the next hour, kept it at 30 miles per hour. Find the average speed of the motion.
Problem 2
A fellow travels from city A to city B. The first half of the way, he drove at the constant speed of 20 miles per hour. Then he (instantaneously) increased his speed and traveled the remaining distance at 30 miles per hour. Find the average speed of the motion.
In problem 1, the arithmetic mean works. In problem 2, the harmonic mean works. Paulg's statement was of the Problem 1 kind but he treated it as though it were of the Problem 2 kind.
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“Science is like sex: sometimes something useful comes out, but that is not the reason we are doing it.†– Richard Feynman
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reesescups Title: //Captain America
Posts: 2,537
Registered: 2003-5-26 14:45:53
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Groucho48 posted:
Paulg's statement was of the Problem 1 kind but he treated it as though it were of the Problem 2 kind.
It's called failing at semantics
less words, more posts for you!
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"man up, you wimp." - Groucho48
"I'm not racist at all." - dae_trist
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Sin_of_Onin Posts: 1,307
Registered: 2005-6-29 08:21:12
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
From what I can tell from the context of the quote Obama is referencing the way the government calculates the number for fleet standards. ie my link
/shrug
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paulg_68 Posts: 2,469
Registered: 2009-7-27 18:45:54
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Give it up Groucho. At least Yuki is getting out of this thread with some dignity.
Yukishiro1 posted:
Holy crap, Paul was actually (kinda) right about something in spite of himself. They do use a harmonic mean for the CAFE standards. 
In case you didn't realize it (and obviously you don't) there are actually several different mathematically valid ways to determine an average. In each specific case you use the method that makes the most sense. You're stuck on the method you learned in 5th grade. You seem to think it is the universally correct answer for all occasions. It is not. In fact it's entirely useless in this context.
If we calculated the average your way we could dramatically decrease our overall fuel efficiency and still hit the 54.5mpg target. What would be the point of that?
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Groucho48 Posts: 821
Registered: 2003-10-22 03:00:14
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Date Posted:
1/1/00 12:01am
Subject:
Obama: Fuel-efficient cars an answer to gas prices |
Sin_of_Onin posted:
From what I can tell from the context of the quote Obama is referencing the way the government calculates the number for fleet standards. ie my link
/shrug
Your link was fine. In the overall picture, the harmonic average is probably the more useful. Paulg is right in that what we really need to know is how much gas we will use in actually driving a bunch of miles. If I had been in his place, I might have used his example to back up his original assertion, too. But, then, when folks called me on it, I would have agreed that my first statement was poorly worded and that things were really more complicated than that.
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“Science is like sex: sometimes something useful comes out, but that is not the reason we are doing it.†– Richard Feynman
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