Fuel Economy Rumors

[nobodywise]

Windows up = Better MPG
(Due to less drag)

I love the back of my car, the front... not so much

[rningonfumes]

Evidence?

[nobodywise]

More of a question tbh and it's a thread for people to add what they have heard and to elaborate on them

I love the back of my car, the front... not so much

[rningonfumes]

Got it.

[roxy1]

my experience has been that up to 60-62 mph my mpg is better with windows down/ac off. above that window up/ac on the over as the more efficient method.

[why?]

AC always should be off. If you can anyways. The drag the windows cause is negligible at any speed that is legal to drive.

[nookandcrannycar]

Originally Posted by why?

AC always should be off. If you can anyways.

...Here that is a BIG if. I read somewhere (can't remember if it was here or not) that the the A/C being on all the time only makes a 1 MPG difference.

[roxy1]

Originally Posted by nookandcrannycar

...Here that is a BIG if. I read somewhere (can't remember if it was here or not) that the the A/C being on all the time only makes a 1 MPG difference.

its not much. I usually lose around 1-2 mpg's on a tank if its a hot week and ac was on full time.

however, if I am on a longer trip of mostly interstate (65+mph) and the windows are down I will lose 2-3 mpg's.

a bigger issue to me is that at highway speed and drivers window down, the noise level is just way to high for my liking. this has nothing to do with the car itself. drivers window down is just very noisy no matter what car I am in.

check this out:

http://www.hc-sc.gc.ca/hl-vs/iyh-vsv...dition-eng.php

It's been found that a variety of everyday activities can cause exposure to sound levels above 85 dBA. A few examples are:
•listening to music through headphones or earbuds
•attending a rock music concert
•mowing the lawn
•using a table saw
•driving a car on the highway with the windows open

at the decibel levels of an open window at highway speeds, hearing loss is a real possibility over time. its just so gradual and cumulative that people wont readily notice it. it will just be one of many factors leading to poorer hearing later in life.

[nookandcrannycar]

Originally Posted by roxy1

its not much. I usually lose around 1-2 mpg's on a tank if its a hot week and ac was on full time.

however, if I am on a longer trip of mostly interstate (65+mph) and the windows are down I will lose 2-3 mpg's.

a bigger issue to me is that at highway speed and drivers window down, the noise level is just way to high for my liking. this has nothing to do with the car itself. drivers window down is just very noisy no matter what car I am in.

check this out:

http://www.hc-sc.gc.ca/hl-vs/iyh-vsv...dition-eng.php

It's been found that a variety of everyday activities can cause exposure to sound levels above 85 dBA. A few examples are:
•listening to music through headphones or earbuds
•attending a rock music concert
•mowing the lawn
•using a table saw
•driving a car on the highway with the windows open

at the decibel levels of an open window at highway speeds, hearing loss is a real possibility over time. its just so gradual and cumulative that people wont readily notice it. it will just be one of many factors leading to poorer hearing later in life.

I almost never drive with my windows down...but some of the other things included in your link.... Not in either of my 'Vitzes', but in quite a few other cars I have had high quality (but also capable of a very high SPL readings) stereo systems in them. I wonder if I will be nearly deaf when I am old . My uncle (my mother's sister's husband) is a retired dentist. He has a great sense of humor about it, but he has huge ears and (despite very expensive hearing aids) has trouble hearing. I wonder if many years of hearing that drill damaged his hearing ?

[why?]

Originally Posted by nookandcrannycar

I almost never drive with my windows down...but some of the other things included in your link.... Not in either of my 'Vitzes', but in quite a few other cars I have had high quality (but also capable of a very high SPL readings) stereo systems in them. I wonder if I will be nearly deaf when I am old . My uncle (my mother's sister's husband) is a retired dentist. He has a great sense of humor about it, but he has huge ears and (despite very expensive hearing aids) has trouble hearing. I wonder if many years of hearing that drill damaged his hearing ?

any audio enthusiast is pretty much screwed. A few older musicians have been honest and mentioned hearing loss from all the headphones and monitors they have used throughout their careers.

[Kar98]

Originally Posted by nookandcrannycar

My uncle (my mother's sister's husband) is a retired dentist. He has a great sense of humor about it, but he has huge ears and (despite very expensive hearing aids) has trouble hearing. I wonder if many years of hearing that drill damaged his hearing ?

My mother's uncle (her mother's brother) was an artillery man in WW2. Guy was stone deaf. Had to have a phone that flashed strobes to get his attention, and an inductive loop around the couch to get the sound from the phone and the TV into his hearing aid.

[Kar98]

Originally Posted by why?

AC always should be off. If you can anyways. The drag the windows cause is negligible at any speed that is legal to drive.

You got it just the wrong way around. Of course if the maximum speed limit in in the Soviet People's Republic of Cape Codistan is 55 mph, same as the highest temps, you'd be right for your location.

Even before there WAS A/C owner's manuals recommended to use the wing vents and the fans for cooling rather than the windows because of decreased fuel economy.

[nookandcrannycar]

Originally Posted by Kar98

Of course if the maximum speed limit in in the Soviet People's Republic of Cape Codistan is 55 mph

I wouldn't be surprised if Why? agreed with this sentiment . He thinks that the world would be better off if 90% of the people in the U.S. Northeast ceased to exiist .

[roxy1]

Originally Posted by nookandcrannycar

He thinks that the world would be better off if 90% of the people in the U.S. Northeast ceased to exiist .

having lived in Connecticut for a year, im thinking that 90% is a bit low.

[nookandcrannycar]

Originally Posted by roxy1

having lived in Connecticut for a year, im thinking that 90% is a bit low.

...... got to leave room for most Yarisworld members in the Northeast and their friends and families.

[nobodywise]

Anymore rumors?

I love the back of my car, the front... not so much

[nobodywise]

I also heard that fueling the car at night gets you more gas? I guess due to evaporation?

I love the back of my car, the front... not so much

[why?]

Originally Posted by nobodywise

I also heard that fueling the car at night gets you more gas? I guess due to evaporation?

I love the back of my car, the front... not so much

It is a bad rumor made by people who do not know gas is stored underground and is always very close to 55 degrees no matter what the outside temp is.