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Fuel Economy Standard...Universal Law #4477108
08/02/17 05:48 AM
08/02/17 05:48 AM
Joined: Dec 2002
Posts: 42,513
'Stralia
Shannow Online content OP
Shannow  Online Content OP

Joined: Dec 2002
Posts: 42,513
'Stralia
of unintended consequences...for those of us here, Gary Allan's universal law of unintended consequences was that the solution to a problem brings about more, and bigger consequences than it intended to solve.

This one motor vehicle HVAC systems...
* Make them more efficient, and you burn less fuel (or emit less C, whichever the bent of the boffin in charge).
* reduce cabin leakage, and they have less air to cool, taking less power.
* reduce the leakage to zero (like being locked in an icebox), and they are more efficient still.

http://articles.sae.org/15377/

"If it only saves one life" is reason to regulate something into or out of existence, then what about regulations that have directly, and measurably according to Az authorities cost lives...

(Thanks to Terry D for the article on Linkedin)

Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477117
08/02/17 06:09 AM
08/02/17 06:09 AM
Joined: Jul 2003
Posts: 5,072
New Zealand
Silk Offline
Silk  Offline

Joined: Jul 2003
Posts: 5,072
New Zealand
I never use recirculation, always vented, no a/c, and around town I'm a window down driver. I probably have excess cabin oxygen.


1987 BMW R65 - Aegis SAE30
2005 Nissan Expert - 5W-40 Castrol Magnatec diesel.
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477128
08/02/17 06:35 AM
08/02/17 06:35 AM
Joined: Jun 2011
Posts: 1,831
Crawfordville FL
SilverFusion2010 Online content
SilverFusion2010  Online Content

Joined: Jun 2011
Posts: 1,831
Crawfordville FL
I've not suffocated yet. Now my roommate almost killed himself hauling a bunch of dry ice with the windows up. I laughed


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Fuel Economy Standard...Universal Law [Re: Silk] #4477129
08/02/17 06:38 AM
08/02/17 06:38 AM
Joined: Dec 2006
Posts: 19,429
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline

Joined: Dec 2006
Posts: 19,429
Dallas,Tx USA
Originally Posted By: Silk
I never use recirculation, always vented, no a/c, and around town I'm a window down driver. I probably have excess cabin oxygen.


I'm the same way. Windows down,sunroof open,t-tops off laugh I only use the AC if my passenger requests.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum HM 10W30

Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477141
08/02/17 07:20 AM
08/02/17 07:20 AM
Joined: Mar 2012
Posts: 1,455
San Antonio, TX
E150GT Offline
E150GT  Offline

Joined: Mar 2012
Posts: 1,455
San Antonio, TX
I use recirculate because it's hot outside. On a long trip I might take it off after a while because I get too cold. My old 86 Mercedes would turn recirculate off after a while.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477145
08/02/17 07:25 AM
08/02/17 07:25 AM
Joined: Jun 2003
Posts: 5,975
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,975
Illinois
99% of the time I have the AC on it's in recirc mode. Still plenty of air moving through the car. Cars have vents in the rear usually covered by flimsy flaps under the trunk liner.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477146
08/02/17 07:25 AM
08/02/17 07:25 AM
Joined: Apr 2013
Posts: 6,077
FL, USA
gregk24 Offline
gregk24  Offline

Joined: Apr 2013
Posts: 6,077
FL, USA
I usually leave the a/c set on 64 and the car will automatically turn on / off recirculate as needed.


2012 Honda Accord EX-L K24z3
56,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
44,xxx miles
Castrol Edge 0w40 / OEM filter
Re: Fuel Economy Standard...Universal Law [Re: SHOZ] #4477148
08/02/17 07:30 AM
08/02/17 07:30 AM
Joined: Dec 2002
Posts: 42,513
'Stralia
Shannow Online content OP
Shannow  Online Content OP

Joined: Dec 2002
Posts: 42,513
'Stralia
Originally Posted By: SHOZ
99% of the time I have the AC on it's in recirc mode. Still plenty of air moving through the car. Cars have vents in the rear usually covered by flimsy flaps under the trunk liner.


You didn't even red the SAE link, did you ?

(per usual)

Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477156
08/02/17 07:39 AM
08/02/17 07:39 AM
Joined: Feb 2013
Posts: 3,461
Central Virginia
Silverado12 Offline
Silverado12  Offline

Joined: Feb 2013
Posts: 3,461
Central Virginia
Interesting. My pickup truck has a recirc button, but after you turn the key off it automatically resets back to fresh air. FWIW sometimes around here you need the max a/c recirculated air and I'll keep in mind to open it up to fresh air once the car is cooled down. Would have never guessed there could be a buildup of carbon dioxide.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477159
08/02/17 07:41 AM
08/02/17 07:41 AM
Joined: Jun 2003
Posts: 5,975
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,975
Illinois
Originally Posted By: Shannow
Originally Posted By: SHOZ
99% of the time I have the AC on it's in recirc mode. Still plenty of air moving through the car. Cars have vents in the rear usually covered by flimsy flaps under the trunk liner.


You didn't even red the SAE link, did you ?

(per usual)
That's a fact. I do have a CO2 meter. Tonight I'll drive around with the AC on and get some readings from it.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Fuel Economy Standard...Universal Law [Re: SHOZ] #4477164
08/02/17 07:46 AM
08/02/17 07:46 AM
Joined: Dec 2002
Posts: 42,513
'Stralia
Shannow Online content OP
Shannow  Online Content OP

Joined: Dec 2002
Posts: 42,513
'Stralia
It's always a fact with you...isn't it.

No facts, just opinion and rhetoric.

Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477171
08/02/17 07:52 AM
08/02/17 07:52 AM
Joined: Jun 2003
Posts: 5,975
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,975
Illinois
Originally Posted By: Shannow
It's always a fact with you...isn't it.

No facts, just opinion and rhetoric.
I'll take pictures for you......


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477179
08/02/17 08:13 AM
08/02/17 08:13 AM
Joined: Dec 2006
Posts: 8,362
Canuck living in California
KrisZ Offline
KrisZ  Offline

Joined: Dec 2006
Posts: 8,362
Canuck living in California
Interesting article indeed. I don't remember exactly, but a high concentration of CO2 causes sleepiness, delays reaction time and ultimately loss of consciousness. In a car, that will most likely lead to a crash long before someone actually suffocates from lack of oxygen.


2015 Grand Caravan 3.6L - 31k miles.
2006 Mazda 3 2.0L - 171k miles
Re: Fuel Economy Standard...Universal Law [Re: SHOZ] #4477184
08/02/17 08:17 AM
08/02/17 08:17 AM
Joined: Dec 2006
Posts: 8,362
Canuck living in California
KrisZ Offline
KrisZ  Offline

Joined: Dec 2006
Posts: 8,362
Canuck living in California
Originally Posted By: SHOZ
99% of the time I have the AC on it's in recirc mode. Still plenty of air moving through the car. Cars have vents in the rear usually covered by flimsy flaps under the trunk liner.


Those flaps are there to release the pressure when you slam the doors closed, when everything else is closed. They're not there to provide fresh air.


2015 Grand Caravan 3.6L - 31k miles.
2006 Mazda 3 2.0L - 171k miles
Re: Fuel Economy Standard...Universal Law [Re: Shannow] #4477188
08/02/17 08:22 AM
08/02/17 08:22 AM
Joined: Jun 2003
Posts: 5,975
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,975
Illinois
How high is too high for CO2 levels? Currently 820 ppm in the house.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
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