SickBeast's Fuel Economy Guide

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Bignate603

Lifer
Sep 5, 2000
13,897
1
0
Originally posted by: JulesMaximus
Well, I'm not one to go through life worrying about things I have zero control over. And I'm not about to wrap myself in the biggest gas guzzling SUV on the off chance that some moron might crash into me.

I'm not planning on letting it be the only thing that dictates my next vehicle purchase but it does play a role. If I can find a vehicle that meets my needs for a reasonable price that's safer than the others in its class that would be a good selling point for me.
 

JulesMaximus

No Lifer
Jul 3, 2003
74,534
911
126
Originally posted by: Bignate603
Originally posted by: JulesMaximus
Well, I'm not one to go through life worrying about things I have zero control over. And I'm not about to wrap myself in the biggest gas guzzling SUV on the off chance that some moron might crash into me.

I'm not planning on letting it be the only thing that dictates my next vehicle purchase but it does play a role. If I can find a vehicle that meets my needs for a reasonable price that's safer than the others in its class that would be a good selling point for me.

It would factor in but I sure as hell wouldn't be shopping 20 year old cars like fleabag under the delusion that they are on par in ANY way with modern cars. :laugh:
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
Originally posted by: LTC8K6
Originally posted by: PlasmaBomb
Originally posted by: LTC8K6
Auto manufacturers who ship their vehicles overseas routinely OVER-INFLATE their tires up to 80PSI (on a 44psi tire for example) in order to prevent the car from sitting on its rims by the time it arrives at its destination.

Why not just use nitrogen? My tires came filled with nitrogen when I bought the car and the pressure never drops. Almost a year later and they haven't lost any pressure.

Why take the time to pump them way up?

/facepalm.

Nitrogen will still leak out of tyres.

Sure it will, no one said it wouldn't, but replacing the 21% oxygen with Nitrogen's fatter molecule should slow down the leakage. I've never had tires maintain their pressure this long before.

The difference between the size of the atoms is small (65 pm for Nitrogen vs. 60 for Oxygen), in comparison to Oxygens higher weight.

Webelements puts the covalent radius of nitrogen at 75 pm and oxygen at 73 pm, which gives <3% difference between N2 and O2.
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
Originally posted by: SickBeast
Originally posted by: BoberFett
Originally posted by: fleabag
Originally posted by: PhoKingGuy
Originally posted by: fleabag

Oh wow.... You're like those idiots who think that two cars going 30mph crashing into each other is twice as bad as one car going 30mph into a wall.....

It depends if the collision is elastic or inelastic

FINE, it's either two cars each going 30mph crashing head on OR one car going 30mph crashing into a IMMOVABLE SOLID AND RIGID WALL.

What are the masses of both cars involved?
It doesn't matter. PhoKingGuy is right in the sense that if you have more tire contact with the road, you will have a shorter stopping distance which will save your life in an emergency.

It was aimed at fleabag... the quotes are just poor.
 

fleabag

Banned
Oct 1, 2007
2,450
1
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Originally posted by: thescreensavers
Originally posted by: fleabag
Originally posted by: thescreensavers
the reason for off sets is because "in a real world situation or most of the time" People try to turn away instead of hitting head on. But I couldn't find any other videos for older cars sorry lol Its still similar enough... I could of found videos with Semis and small cars but whats the point? we all know what happens.

But modern day cars are safer then 1980's cars as showed in that video. Yes it might not be 100% equal videos but its close enough....

I'm not saying cars today aren't safer than cars of the 80s, I'm saying in the exact same tests, cars of the 80s that got 5 stars and cars of today that get 5 stars are directly comparable. Aside from side impact and offset crash testing, there is nothing else to indicate whether a car of today will perform better in a crash test than a car from 1980. You can't automatically assume that the car from 1980 is going to do worse just because it's older. You should see what a 5 star crash test from 1980 looks like, it's a lot better than you'd imagine. Cars of the 1980s and early to mid 1990s for the most part weren't tested or designed for those test, yet those are two exclusive trains of thought. You can have a car that is designed for a test and do bad and you can have a car that isn't designed for a test perform well, and vice versa. I've seen cars that aren't designed for say the side impact crash test actually do quite well.

There are just too many factors in a crash test that make declarations such as "this car because it was made in X year is less safe than car made in Y year" to be false more than you'd expect.

For example, that Escort got a 5 star rating for passenger and 3 star for the driver. Not so great, right? Well the 1991 Ford Escort Gets 5 Stars for both passenger and the driver. So, do you think the '91 is a LOT safer than the '89? I'd have to say no.
Why?
Well why the chest and head had low risk for injuries, what it didn't do so well in is the femur loads. It has a 1403lbs and 1055lbs for driver, 2151lbs and 1119lbs femur loads; this is really high especially considering that this is a crash into a wall with just the weight of the car itself. The star rating doesn't consider femur load into the test and therefore it's deceptive.

The only test that has come close to giving cars a more fair and accurate overall assessment to its safety are the IIHS tests but since those tests weren't conducted on some 1995 and no 1994 and earlier model year cars, one cannot definitively determine whether one vehicle is safer than another just because it's older. But going off of what I do know which is the NHTSA tests, a 5 star rated car IN THAT CRASH is just as safe as another 5 star rated car assuming they're the same weight and size, regardless of model year.

You can't assume that a newer vehicle is safer than an older vehicle, especially when you throw in variables that aren't even tested for like tall or really short passengers, having the sun visor down, etc. etc.


There is not, your right. But those 2 count for a lot... If you look at car accidents most of them are offset and not full on perfect crashes which is why they now do the offset test. Saying that offset and side crash testing are no biggie, and that they don't make a 2009 car safer then a 1980's car your crazy.

you can only test for so many variables I know, but based on the standard... Also if you look at Femur loads, and chest deceleration from older cars to newer cars you can see that the newer cars of the same models are lower thus improving chance to survive.

Lets take a nissan Maxima


1990
Driver/Passenger

Head Injury Criterion 808 736
Chest deceleration (g's) 51 44
Femur load l/r1 (lb) 611 / 664 1409 / 1043

2009

Head Injury Criterion 255 366
Chest deceleration (g's) 43 41
Femur load l/r1 (lb) 301 / 133 682 / 378

You don't make a good argument with that Nissan Maxima because there were ALREADY cars being made in 1990 or earlier that were scoring better in the crash tests than that Maxima.

Ratings are as follows: Driver, Passenger for HIC and Chest, and Driver Right leg, Driver left leg; Passenger Right leg, Passenger Left leg for femur loads.


1996 Volvo 850, 5 star driver 4 passenger
HIC 434, 421
Chest 43, 58
Femur load 1404, 1371; 1093 945
So it gets a 5 and 4 star rating yet it has high femur loads for passenger and driver.

1993 Toyta T100 1 star driver and passenger
HIC 1430, 1264
Chest 43, 61
Femur load 998, 1332; 274, 673

1984 Toyota Corolla 2dr 5 star driver 4 star passenger
HIC 432, 602
Chest 37, 47
Femur load 450, 1100; 300, 580.

1990 Toyota Corolla 3 star driver 2 star passenger
HIC 1030, 1141
Chest 47, 53
Femur load 1341, 1549; 455, 447

1998 Corolla, 4 star driver and passenger
HIC 384, 433
Chest 54, 49
Femur Load 1246, 1414; 574, 975

1984 CRX 5 star driver 4 star passenger
HIC 571, 955
Chest 38, 34
Femur Load 2850, 1975; 1880,1970.

So check out the Corolla, it actually got WORSE ratings after the 1984-1987 MY with a really bad rating for the 1988-1992 MY and ok ratings for the '93-'97/'98-'02 MY. (Didn't post '93-'97 b/c they're kinda redundant)

The whole point of this argument and why it even started in the first place is that cars aren't heavier today because they're "safer", they're heavier because the manufacturers don't know how to stop making their cars increasingly bigger and not add more heavy sound insulation and other sometimes unnecessary amenities like big rims, "extra comfy seats", etc. etc. My argument is that you can make a safe car without making it weigh a whole lot and this is evidenced by the corolla and a few other cars that I may or may not have listed.

Probably the only reason why those cars aren't exactly as "safe" as the cars today is not because they're missing "critical" safety systems (airbags, heavy safety reinforcement, etc.) but because they simply weren't designed that way. We don't know how the 1984 corolla does in an offset crash but assuming we do and that it doesn't do so well, there is absolutely NOTHING to say that they couldn't have made the Corolla do well in both the full frontal and offset crash test without a significant increase in manufacturing cost. (i.e, not needing additional systems like airbags)
 

SparkyJJO

Lifer
May 16, 2002
13,357
7
81
Originally posted by: JulesMaximus
I can't believe you guys are still arguing about car safety...You want to know what the biggest factor in automobile safety is? It's the knucklehead sitting in the drivers seat. You know who is most likely to be involved in an accident and be seriously injured or killed? Young adult males.

All the safety features in the world aren't going to protect you from your own stupidity...they might help but you guys would do better to go take some professional driver training instead of arguing about the crash worthiness of the vehicles you drive.

After looking at the crazy driving by women (and it seems the majority of possible accidents I've avoided were caused by a woman doing something stupid/not paying attention/on the phone/etc) I somehow have a hard time believing this

I know that's what the statistics say, but still.
 

JulesMaximus

No Lifer
Jul 3, 2003
74,534
911
126
Originally posted by: SparkyJJO
Originally posted by: JulesMaximus
I can't believe you guys are still arguing about car safety...You want to know what the biggest factor in automobile safety is? It's the knucklehead sitting in the drivers seat. You know who is most likely to be involved in an accident and be seriously injured or killed? Young adult males.

All the safety features in the world aren't going to protect you from your own stupidity...they might help but you guys would do better to go take some professional driver training instead of arguing about the crash worthiness of the vehicles you drive.

After looking at the crazy driving by women (and it seems the majority of possible accidents I've avoided were caused by a woman doing something stupid/not paying attention/on the phone/etc) I somehow have a hard time believing this

I know that's what the statistics say, but still.

As surprising as it is...it is actually true. Statistically, the majority of members of ATOT are in fact the worst drivers on the planet and the riskiest to insure.
 

Bignate603

Lifer
Sep 5, 2000
13,897
1
0
Originally posted by: JulesMaximus
Originally posted by: SparkyJJO
Originally posted by: JulesMaximus
I can't believe you guys are still arguing about car safety...You want to know what the biggest factor in automobile safety is? It's the knucklehead sitting in the drivers seat. You know who is most likely to be involved in an accident and be seriously injured or killed? Young adult males.

All the safety features in the world aren't going to protect you from your own stupidity...they might help but you guys would do better to go take some professional driver training instead of arguing about the crash worthiness of the vehicles you drive.

After looking at the crazy driving by women (and it seems the majority of possible accidents I've avoided were caused by a woman doing something stupid/not paying attention/on the phone/etc) I somehow have a hard time believing this

I know that's what the statistics say, but still.

As surprising as it is...it is actually true. Statistically, the majority of members of ATOT are in fact the worst drivers on the planet and the riskiest to insure.

Considering some of the characters on this board (and in this thread) I can completely believe that.
 

SparkyJJO

Lifer
May 16, 2002
13,357
7
81
Originally posted by: Bignate603
Originally posted by: JulesMaximus
Originally posted by: SparkyJJO
Originally posted by: JulesMaximus
I can't believe you guys are still arguing about car safety...You want to know what the biggest factor in automobile safety is? It's the knucklehead sitting in the drivers seat. You know who is most likely to be involved in an accident and be seriously injured or killed? Young adult males.

All the safety features in the world aren't going to protect you from your own stupidity...they might help but you guys would do better to go take some professional driver training instead of arguing about the crash worthiness of the vehicles you drive.

After looking at the crazy driving by women (and it seems the majority of possible accidents I've avoided were caused by a woman doing something stupid/not paying attention/on the phone/etc) I somehow have a hard time believing this

I know that's what the statistics say, but still.

As surprising as it is...it is actually true. Statistically, the majority of members of ATOT are in fact the worst drivers on the planet and the riskiest to insure.

Considering some of the characters on this board (and in this thread) I can completely believe that.

Agreed.
 

jlee

Lifer
Sep 12, 2001
48,518
223
106
Originally posted by: BassBomb
how the fuck did a fuel economy thread become about crash tests?

Fleabag showed up, and he is the Master of All when it comes to automotive engineering. Did you miss the airbag thread?
 

thescreensavers

Diamond Member
Aug 3, 2005
9,916
2
81
Originally posted by: fleabag
[
So check out the Corolla, it actually got WORSE ratings after the 1984-1987 MY with a really bad rating for the 1988-1992 MY and ok ratings for the '93-'97/'98-'02 MY. (Didn't post '93-'97 b/c they're kinda redundant)

The whole point of this argument and why it even started in the first place is that cars aren't heavier today because they're "safer", they're heavier because the manufacturers don't know how to stop making their cars increasingly bigger and not add more heavy sound insulation and other sometimes unnecessary amenities like big rims, "extra comfy seats", etc. etc. My argument is that you can make a safe car without making it weigh a whole lot and this is evidenced by the corolla and a few other cars that I may or may not have listed.

Probably the only reason why those cars aren't exactly as "safe" as the cars today is not because they're missing "critical" safety systems (airbags, heavy safety reinforcement, etc.) but because they simply weren't designed that way. We don't know how the 1984 corolla does in an offset crash but assuming we do and that it doesn't do so well, there is absolutely NOTHING to say that they couldn't have made the Corolla do well in both the full frontal and offset crash test without a significant increase in manufacturing cost. (i.e, not needing additional systems like airbags)


I am talking about 1980-1990s as being the old cars are 2003ish + being the new cars. You can see newer models(2003+) have lower numbers all around board.

I am sure they could of build it better if the tests for offset were done then but the whole weight thing is iffy. If it was so simple to lower the weights of cars then why dont they do it then?
 

fleabag

Banned
Oct 1, 2007
2,450
1
0
Originally posted by: BassBomb
how the fuck did a fuel economy thread become about crash tests?

When people starting saying that the reason why cars are so fucking heavy and get bad mileage is because of "all the safety systems", that you can't have a light car that is safe and I pointed out to them that they were wrong.
 

PhoKingGuy

Diamond Member
Nov 15, 2007
4,685
0
76
Originally posted by: fleabag
Originally posted by: BassBomb
how the fuck did a fuel economy thread become about crash tests?

When people starting saying that the reason why cars are so fucking heavy and get bad mileage is because of "all the safety systems", that you can't have a light car that is safe and I pointed out to them that they were wrong.

You should apply for head of engineering at Honda, you obviously know more than all of them do
 

fleabag

Banned
Oct 1, 2007
2,450
1
0
Originally posted by: PhoKingGuy
Originally posted by: fleabag
Originally posted by: BassBomb
how the fuck did a fuel economy thread become about crash tests?

When people starting saying that the reason why cars are so fucking heavy and get bad mileage is because of "all the safety systems", that you can't have a light car that is safe and I pointed out to them that they were wrong.

You should apply for head of engineering at Honda, you obviously know more than all of them do

Engineering and Design teams guided by "focus groups" are not one in the same. Honda of today is nothing like Honda of 20 years ago... Honda has headed down hill since Soichiro Honda died.
 

PhoKingGuy

Diamond Member
Nov 15, 2007
4,685
0
76
Originally posted by: fleabag
Originally posted by: PhoKingGuy
Originally posted by: fleabag
Originally posted by: BassBomb
how the fuck did a fuel economy thread become about crash tests?

When people starting saying that the reason why cars are so fucking heavy and get bad mileage is because of "all the safety systems", that you can't have a light car that is safe and I pointed out to them that they were wrong.

You should apply for head of engineering at Honda, you obviously know more than all of them do

Engineering and Design teams guided by "focus groups" are not one in the same. Honda of today is nothing like Honda of 20 years ago... Honda has headed down hill since Soichiro Honda died.

No shit, with crap like this Crosstour

 

fleabag

Banned
Oct 1, 2007
2,450
1
0
Originally posted by: thescreensavers
Originally posted by: fleabag
[
So check out the Corolla, it actually got WORSE ratings after the 1984-1987 MY with a really bad rating for the 1988-1992 MY and ok ratings for the '93-'97/'98-'02 MY. (Didn't post '93-'97 b/c they're kinda redundant)

The whole point of this argument and why it even started in the first place is that cars aren't heavier today because they're "safer", they're heavier because the manufacturers don't know how to stop making their cars increasingly bigger and not add more heavy sound insulation and other sometimes unnecessary amenities like big rims, "extra comfy seats", etc. etc. My argument is that you can make a safe car without making it weigh a whole lot and this is evidenced by the corolla and a few other cars that I may or may not have listed.

Probably the only reason why those cars aren't exactly as "safe" as the cars today is not because they're missing "critical" safety systems (airbags, heavy safety reinforcement, etc.) but because they simply weren't designed that way. We don't know how the 1984 corolla does in an offset crash but assuming we do and that it doesn't do so well, there is absolutely NOTHING to say that they couldn't have made the Corolla do well in both the full frontal and offset crash test without a significant increase in manufacturing cost. (i.e, not needing additional systems like airbags)


I am talking about 1980-1990s as being the old cars are 2003ish + being the new cars. You can see newer models(2003+) have lower numbers all around board.

I am sure they could of build it better if the tests for offset were done then but the whole weight thing is iffy. If it was so simple to lower the weights of cars then why dont they do it then?
I thought this was discussed ad nauseum already!?!?!
Ok, let's summarize it.
Here are some reasons why the haven't improved fuel economy in cars like they should have.
  • Weight
  • Performance
  • Comfort
  • Sound
  • Looks
  • Cost

Now let's break down some of these points (some overlap with others)
  • Weight
Cars are getting heavier because they keep up-sizing existing models. Now this up sizing hasn't ALWAYS resulted in a heavier car, for example the Civic Coupes & Sedans from '92-'95 weigh the same or are slightly heavier than the Civic Coupes & Sedans from '96-'00. However the Civic Hatches from '92-'95 are indeed lighter than the '96-'00 Hatches because the '96-'00 gained like 6 inches in length, and got a little wider.
More sound insulation to reduce the amount of road noise
Getting bigger wheels and tires
Extra amenities like A/C, leather, more interior padding, complex A/V systems,
Bigger engines and beefier transmissions to cope with the additional power from the more powerful engines

  • Performance
Engines have increased displacement and been tuned more for performance than fuel economy. I could get into the details but there is no need when it's pretty much agreed that automakers have been focusing on performance instead of fuel economy.
Transmissions to cope with more powerful engines have in turn had to get bigger transmissions which means more wasted fuel (for various reasons)
Tires have been getting the short sidewall with tread designed for better grip and total disregard to better fuel economy

  • Looks
While cars with sharp transitions, angles and boxy looks tend to (imo) look better than those bubbly cars or cars that are designed with aerodynamics in mind.

There is other stuff that can be said about those other bullet points but I feel kinda lazy now and don't feel like elaborating on them especially when you consider that the first two mostly say what was needed to be said.



If there is anything you should know about engineering, it is this: Engineering is all about compromises.
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
Cost is also important.

It is easier to make something safer by bulking up the crumple zones, passenger cell, side impact bars, than switching to a stronger material that costs 4x as much.

Performance/comfort are very important to consumers, so manufacturers have chased power and comfort to boost sales.

Got an old civic? Great this new one has 50 BHP more and air conditioning, sat nav, fog lights, 17" alloys, leather trim, and more interior space and comfy seats for your fat ass...

The thing is that worked. People wanted a new car that was better than their old car, they didn't want one that had the same power and features, but had 5 mpg better fuel economy.
 

desy

Diamond Member
Jan 13, 2000
5,442
211
106
I watched a show about the new Mazda 3 and most of the engineering changes went into high strength steel in places you can't see
 

PlasmaBomb

Lifer
Nov 19, 2004
11,636
2
81
Originally posted by: desy
I watched a show about the new Mazda 3 and most of the engineering changes went into high strength steel in places you can't see


http://www.blogcdn.com/www.aut.../04/Volvo-safety-1.JPG
http://www.blogcdn.com/www.aut.../04/Volvo-safety-2.JPG
http://www.blogcdn.com/www.aut.../04/Volvo-safety-3.JPG
http://www.blogcdn.com/www.aut.../04/Volvo-safety-4.JPG

http://4.bp.blogspot.com/_0oCr...lvo-xc60-53_800x0w.jpg

Blue is high-strength steel, orange is very-high-strength steel, yellow is extra-high-strength steel, and red is ultra-high-strength steel.

I had a nice GM spec but can't find it

Edit: Since you mentioned the Mazda 3
 

Gillbot

Lifer
Jan 11, 2001
28,830
17
81
Ok, I've let this go on long enough. If you guys want to argue about crash tests make a new thread. This one is so derailed, I'm locking it up. Feel free to repost it if you want but it will not get a sticky.

Anandtech Moderator
Gillbot
 
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