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History of Fuel Efficiency

How to save energy through both societal and individual actions.

Re: History of Fuel Efficiency

Postby smallpoxgirl » Sun 28 Jan 2007, 14:05:13

$this->bbcode_second_pass_quote('MonteQuest', 'S')PG, you miss the point altogether.


It's my thread dang it. I know what point I was making better than you do. :P

$this->bbcode_second_pass_quote('', 'P')ut a modern engine in a Model T chassis without power steering, air conditioning, smog pumps, etc,; use the much more efficient drivetrain, tires, bearings, etc we have today, and I guarantee you will get more miles per gallon than the original equipment.


No argument. I didn't say that more efficient cars couldn't be made. I didn't say that more efficient cars, aren't on the market. I said that cars made today are on average less efficient than they were in the 1908. Certainly consumer choices are the major component of why that's so. I'm not trying to play pin the blame on the car company. I'm just saying that we like to pretend like cars are getting more efficient. In fact what we did was got rid of the fins and the big block motors, but we never even got back to the efficiency level of the Model T.

$this->bbcode_second_pass_quote('', 'M')y point is that lighter, less powerful cars were available, but most people did not buy them. Like I have bolded above, the driver/buyer is the key to the economy of a vehicle.

No argument with any of that. I'm not trying to argue about who is the cause of it, but the fact remains that cars are on average less efficient today than they were in 1908.
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Sun 28 Jan 2007, 14:21:24

$this->bbcode_second_pass_quote('drew', 'Y')ou are arguing for the sake of arguing, and aren't winning.


This isn't an argument. You and Monte just keep trying to sidetrack my thread. I don't disagree with anything you've said. Only it's pertinence to this thread. You are setting up and knocking down strawmen left and right.

$this->bbcode_second_pass_quote('', ' ')What do you define as a starting point? The Model T?

Yes. I think that if you are going to talk about automotive evolution, the Model T is the place to start. Starting in 1950 gives you a skewed perception of the numbers.

$this->bbcode_second_pass_quote('', 'F')ine, it gets 24 mpg, and carried 4 people. The two corrolas I cited get 30 and 42 mpg, and carry 4, or maybe 5 people in a pinch. How is that not improvement?

It's not an improvement because most people aren't driving them, or not enough people are driving them to balance out the guy in the Ford Expedition.
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Re: History of Fuel Efficiency

Postby lper100km » Sun 28 Jan 2007, 15:20:01

Whilst SPG is obviously quite capable of looking after herself in this argument, some support might be useful. I like the simplicity of the opening statement. In a subsequent refinement, SPG is simply stating that the issue is the distance a gallon of fuel will carry four people, regardless of the form of conveyance and is referring to the average fuel consumption of the US auto fleet. In 1908, the fleet was the Model T, so that is a legitimate starting point.

In 100 years, there have been amazing developments in engineering, comfort, safety, speed, acceleration etc etc., but the fact remains that the average fleet fuel consumption still hovers in the region of 25mpg. This is not to say that as reality sets in, more people won't use higher mileage vehicles in future, thus altering the average value favorably. But for today, the statistic seems correct.

The Washington Post article http://www.washingtonmonthly.com/archiv ... 007007.php
summarizing the CAFE standards for autos and trucks suggests that in 2001 (interpolated from the graph) the target for the combined effect of cars and trucks, assuming a 50% split, is about 25mpg. Could it be that in reality, the actual value in 2006 is lower because of the effect of larger and more powerful SUVs and trucks?

The distance a vehicle will carry a passenger load or a ton of freight on a gallon of fuel is a legitimate statistic and, I fear, one which will become uppermost in people’s mind as time goes by. Of course, the time to perform this is very relevant today, but will become less so. Ultimately, a one hp vehicle may take a whole day to travel 25 miles, but, cheer up, it will use bio degradable fuel!
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Re: History of Fuel Efficiency

Postby dooberheim » Sun 28 Jan 2007, 17:28:56

A car is a tool. That deserves to be repeated over and over. I've been telling people that for decades. It's not a "lifestyle choice" or a pet.

I don't put spinner hubcaps on my drill or chainsaw. I don't go out and start the thing for looks. I don't impress people with the noise of my stereo.

One thing I think we need to do is regulate auto accessories. Get people to understand their cars are not essential to their lifestyles.

It'll never woik..

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Re: History of Fuel Efficiency

Postby dukey » Sun 28 Jan 2007, 19:25:48

American cars are just too damn heavy. If they were half the weight they would get a LOT better fuel efficiency. But americans seem obsessed with driving the largest vehicle they can get their hands on.

Meanwhile in europe, we drive small cars and everyone gets pretty good mpg. Also in europe we drive a lot of diesels, but due to insane regulations u yanks can't seem to drive them.

To say engine efficiency hasn't really improved, is just missing the big picture ...
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Re: History of Fuel Efficiency

Postby MonteQuest » Sun 28 Jan 2007, 23:54:06

$this->bbcode_second_pass_quote('smallpoxgirl', ' ')I'm not trying to argue about who is the cause of it, but the fact remains that cars are on average less efficient today than they were in 1908.


No, they are not.

Cars today are more complex, bigger, and have many more amenities, but the efficiency of converting gasoline energy to the road is vastly improved over the Model T.

Currently an internal combustion engine's efficiency is 32%.

In 1900 it was 4%

Image


If not for these gains, today's cars would get only a few miles to the gallon.
Last edited by MonteQuest on Mon 29 Jan 2007, 00:28:43, edited 4 times in total.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:04:09

$this->bbcode_second_pass_quote('lper100km', ' ')In 100 years, there have been amazing developments in engineering, comfort, safety, speed, acceleration etc etc., but the fact remains that the average fleet fuel consumption still hovers in the region of 25mpg.


So, you expect AC, power steering, smog controls, safety, comfort, speed, performance to come for free?

Especially when it is the choice of the buyer and his use of the vehicle that determines mpg?

We should have had a law that says you can't add these things or make them available as options?

All you can buy is a small, slow, no AC, no heater, no powersteering, no smog control, no safety vehicle that won't go over 45?

They made the VW Bug. Why didn't everyone buy one?
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Mon 29 Jan 2007, 00:27:18

$this->bbcode_second_pass_quote('MonteQuest', 'S')o, you expect AC, power steering, smog controls, safety, comfort, speed, performance to come for free?

Those things are all accessories. The basic function of a car is to move people. If you were concerned about moving people efficiently, you would not sacrifice efficiency for accessories. I'm suprised at you Monte. This is the kind of logic an economist would love "OK sure, it uses more gas, but really it's MORE efficient because now it has air conditioning."

$this->bbcode_second_pass_quote('', 'W')e should have had a law that says you can't add these things or make them available as options?

I suspect that if the government stopped subsidizing gas prices, for example funding the Iraq war out of gasoline taxes rather than income taxes, then those accessories would disappear off new car lots in about a month.
"We were standing on the edges
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Mon 29 Jan 2007, 00:30:50

$this->bbcode_second_pass_quote('MonteQuest', 'C')urrently an internal combustion engine's efficiency is 32%.

In 1900 it was 4%


Awww...tricky tricky. Nice try. I'll say it yet again....We are not talking about ENGINE efficiency. We are talking about VEHICLE efficiency. Engines convert chemical into kinetic and heat energy. Vehicles move people.
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Re: History of Fuel Efficiency

Postby Loki » Mon 29 Jan 2007, 00:30:52

$this->bbcode_second_pass_quote('MonteQuest', 'A')ll you can buy is a small, slow, no AC, no heater, no powersteering, no smog control, no safety vehicle that won't go over 45?

They made the VW Bug. Why didn't everyone buy one?

Hey, on the rare occasions it actually ran, the VW Wabbit I used to own did a solid 46 mph (going downhill, with a tailwind). Don't dis the Vee Dub yo. :lol:
Last edited by Loki on Mon 29 Jan 2007, 00:36:35, edited 1 time in total.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:33:57

$this->bbcode_second_pass_quote('smallpoxgirl', ' ')Those things are all accessories. The basic function of a car is to move people. If you were concerned about moving people efficiently, you would not sacrifice efficiency for accessories.


Yes, the same reasoning my grandfather used when he purchsed his 63 Biscayne. No "accessories."

We live and lived in a free market where competition for consumer demand is high. You suggest we need a sterile environment with only the People's Car? Only comes in drab gray?

SPG, you could say the same thing about every single thing ever manufactured.

What's your beef?
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:36:42

$this->bbcode_second_pass_quote('Loki', '')$this->bbcode_second_pass_quote('MonteQuest', 'A')ll you can buy is a small, slow, no AC, no heater, no powersteering, no smog control, no safety vehicle that won't go over 45?

They made the VW Bug. Why didn't everyone buy one?

Hey, on the rare occasions it actually ran, the VW Wabbit I used to own did a solid 46 mph (doing downhill, with a tailwind). Don't dis the Vee Dub yo. :lol:


I'm not. I've owned several. Very efficient form of transportation.

People didn't buy them because they wanted comfort, speed, and performance, not efficiency.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:41:21

$this->bbcode_second_pass_quote('smallpoxgirl', ' ') I'm suprised at you Monte. This is the kind of logic an economist would love "OK sure, it uses more gas, but really it's MORE efficient because now it has air conditioning."



Hogwash! You still don't get the point. These cars get less miles to the gallon because of AC and the like. The cars themselves are much more efficient, they just have things that suck the horsepower from the engine, and they are bigger and heavier. Not too mention, people drive them 75-80 mph, not 45.

The mass the more efficient engine has to move is greater and the accessories rob horsepower, so sure, you get less mpg. It goes without saying. Basic physics.
Last edited by MonteQuest on Mon 29 Jan 2007, 00:44:39, edited 2 times in total.
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Mon 29 Jan 2007, 00:42:06

$this->bbcode_second_pass_quote('MonteQuest', 'S')PG, you could say the same thing about every single thing ever manufactured.

What's your beef?

No beef. Just thought it was a pretty amazing statistic. Secondarily, I wonder if the 1908- 1950 portion of that vehicle efficiency graph doesn't make the opposite argument vis a via Jevon's paradox that the 1950-1990 portion does. Seems that fuel usage has been increasing since 1908 pretty much irrespective of efficiency. Efficiency goes down, and fuel usage goes up. Efficiency goes up, and fuel usage goes up.
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Mon 29 Jan 2007, 00:46:53

$this->bbcode_second_pass_quote('MonteQuest', 'T')hese cars get less miles to the gallon because of AC and the like. The cars themselves are much more efficient, they just have things that suck the horsepower from the engine, and they are bigger and heavier.
Only if you define "car" to not include the accessories, or the body. But that's the definition of an engine. A car includes the accessories, the engine, the body, etc. It's a package deal. An engine doesn't carry you from one place to another. A car does. An engine is only one determinant of the efficiency of a car.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:48:18

$this->bbcode_second_pass_quote('smallpoxgirl', '')$this->bbcode_second_pass_quote('MonteQuest', 'S')PG, you could say the same thing about every single thing ever manufactured.

What's your beef?

No beef. Just thought it was a pretty amazing statistic. Secondarily, I wonder if the 1908- 1950 portion of that vehicle efficiency graph doesn't make the opposite argument vis a via Jevon's paradox that the 1950-1990 portion does. Seems that fuel usage has been increasing since 1908 pretty much irrespective of efficiency. Efficiency goes down, and fuel usage goes up. Efficiency goes up, and fuel usage goes up.


No, look back at the cost of gasoline over those years. Also, these were the growth years of the auto industry. Oil was $.6 cents a barrrel at times.

Not to mention population growth.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 00:51:59

$this->bbcode_second_pass_quote('smallpoxgirl', '')$this->bbcode_second_pass_quote('MonteQuest', 'T')hese cars get less miles to the gallon because of AC and the like. The cars themselves are much more efficient, they just have things that suck the horsepower from the engine, and they are bigger and heavier.
Only if you define "car" to not include the accessories, or the body. But that's the definition of an engine. A car includes the accessories, the engine, the body, etc. It's a package deal. An engine doesn't carry you from one place to another. A car does. An engine is only one determinant of the efficiency of a car.


Of course.

$this->bbcode_second_pass_quote('', 'T')he mass the more efficient engine has to move is greater and the accessories rob horsepower, so sure, you get less mpg. It goes without saying. Basic physics.


One wouldn't expect anything different than that most current cars don't get better mileage than a Model T.

Some do. Like the VW and my grandad's 63'.
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Re: History of Fuel Efficiency

Postby smallpoxgirl » Mon 29 Jan 2007, 01:00:43

$this->bbcode_second_pass_quote('MonteQuest', 'A')lso, these were the growth years of the auto industry.

Exactly. Efficiency was declining and the industry grew, but Jevon says the industry is supposed to grow when efficiency INCREASES.

As for oil prices, I'm not sure how that relates. Does Jevon not apply to cheap energy sources?

$this->bbcode_second_pass_quote('', 'O')ne wouldn't expect anything different than that most current cars don't get better mileage than a Model T.

Well...maybe one Montequest wouldn't. One smallpoxgirl would. If you'd asked me two weeks ago, I would have guessed a model T got maybe 5 mpg. I think it's pretty shocking that we've engineered so much crap into cars that efficiency has gone down over the last 100 years.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 01:04:12

$this->bbcode_second_pass_quote('Loki', ' ')But aren't you a Jevons devotee? Isn't all that efficiency just increasing our overall fuel use? Shouldn't we all be driving Hummers, ya know, to save the Earth and stuff?


That Jevons Paradox says that increased efficiency of a resource leads to greater use of that resource, in no way means we should practice wanton consumption or not conserve.

That is a strawman argument often used to bash Jevons "devotees"

It has no basis in fact, and does not represent the position in any way.

It means our expected results are going to be the opposite. That is why it is a paradox.
Last edited by MonteQuest on Mon 29 Jan 2007, 02:37:52, edited 1 time in total.
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Re: History of Fuel Efficiency

Postby MonteQuest » Mon 29 Jan 2007, 01:09:54

$this->bbcode_second_pass_quote('smallpoxgirl', ' ')Exactly. Efficiency was declining and the industry grew, but Jevon says the industry is supposed to grow when efficiency INCREASES.


As the efficiency of a resource grows, so does it's use.
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