how much gas does AC take up exactly?

[spidey07]

Originally posted by: Koenigsegg
What car? What kind of rpms are you running at at 100?

2004 TL.

Probably because its 6 speed manual. 6th is pretty tall and worhless under 70 Mph. I'd say the rpms are around 3K

 

[rh71]

negligible

 

[Shawn]

1-2mpg for me.

 

[SynthDude2001]

Originally posted by: JulesMaximus
What difference does it make? If it's too hot put the A/C on. My comfort is worth more than $1.00 worth of gasoline.

:thumbsup:

 

[Cashmoney995]

mph has nothing to do with fuel economy. Fuel economy is based solely on what speed the engine is running at. a car running at 4000 rpm uses more gas than a car using 2000 rpm. If your going a 1000mph in a crappy 4 cylinder and your in gear 4 and the engine has to kick up the rpm to 4-5 just to maintain speed then yeah ittll drink fuel, but lets say your in a 6, at 100mph you could be goin 2.5k rpm in 6th gear....



RPM > mph in terms of fuel economy

 

[SagaLore]

Originally posted by: BigJ
More than keeping your windows open.

Actually, Mythbusters showed that AC barely used more gas but putting your windows down caused enough drag to considerably hurt fuel economy.

 

[crab]

Originally posted by: Cashmoney995
mph has nothing to do with fuel economy. Fuel economy is based solely on what speed the engine is running at. a car running at 4000 rpm uses more gas than a car using 2000 rpm. If your going a 1000mph in a crappy 4 cylinder and your in gear 4 and the engine has to kick up the rpm to 4-5 just to maintain speed then yeah ittll drink fuel, but lets say your in a 6, at 100mph you could be goin 2.5k rpm in 6th gear....



RPM > mph in terms of fuel economy

hahaha

 

[imported_Phil]

Originally posted by: Cashmoney995
mph has nothing to do with fuel economy. Fuel economy is based solely on what speed the engine is running at. a car running at 4000 rpm uses more gas than a car using 2000 rpm. If your going a 1000mph in a crappy 4 cylinder and your in gear 4 and the engine has to kick up the rpm to 4-5 just to maintain speed then yeah ittll drink fuel, but lets say your in a 6, at 100mph you could be goin 2.5k rpm in 6th gear....



RPM > mph in terms of fuel economy

*head explodes*

What four-cylinder car will do one thousand miles per hour in fourth gear?!?! 😕😕😕😕😕😕😕😕

 

[nakedfrog]

Originally posted by: SagaLore

Originally posted by: BigJ
More than keeping your windows open.

Actually, Mythbusters showed that AC barely used more gas but putting your windows down caused enough drag to considerably hurt fuel economy.

That will depend on the vehicle, though. I believe our forum member (can't remember who it was) that did a trip with AC one way and windows down the other got better mileage with the windows down.

 

[jaedaliu]

Originally posted by: SagaLore

Originally posted by: BigJ
More than keeping your windows open.

Actually, Mythbusters showed that AC barely used more gas but putting your windows down caused enough drag to considerably hurt fuel economy.

what car was this on? i'm getting 2- 3 mpg more with the AC off and the windows all the way down. 98 Nissan Maxima.

Mythbusters has lots of problems some times. see if you can find their chicken gun experiments.

 

[imported_Phil]

My last car came with a small "advisory" in the manual (yes, irtfm) saying that windows down = 4% increase in fuel consumption.

Thinking about it, I see no real reason for them to lie about it.

 

[SagaLore]

Originally posted by: jaedaliu

Originally posted by: SagaLore

Originally posted by: BigJ
More than keeping your windows open.

Actually, Mythbusters showed that AC barely used more gas but putting your windows down caused enough drag to considerably hurt fuel economy.

what car was this on? i'm getting 2- 3 mpg more with the AC off and the windows all the way down. 98 Nissan Maxima.

Mythbusters has lots of problems some times. see if you can find their chicken gun experiments.

Actually, they were big boxy SUVs.

I'm beginning to wonder the validity of their test, because when I kick my AC on in my Dodge Neon, it causes noticeable drag on the engine...

Maybe it comes down to how aerodynamic your car is, and how much excess power it generates. SUVs already have a lot of drag even with the windows up, and running on a flat track the engines produce much more power than is needed, which can efficiently be used by the AC.

 

[CasioTech]

Originally posted by: crab

Originally posted by: Cashmoney995
mph has nothing to do with fuel economy. Fuel economy is based solely on what speed the engine is running at. a car running at 4000 rpm uses more gas than a car using 2000 rpm. If your going a 1000mph in a crappy 4 cylinder and your in gear 4 and the engine has to kick up the rpm to 4-5 just to maintain speed then yeah ittll drink fuel, but lets say your in a 6, at 100mph you could be goin 2.5k rpm in 6th gear....



RPM > mph in terms of fuel economy

hahaha

 

[Evadman]

Didn't you already ask this question years ago?

 

[Bassyhead]

A couple of horsepower. The refrigeration capacity of a car A/C system is about 2 tons (about the same or a little less than a central A/C system of a typical house).

 

[CasioTech]

Originally posted by: Evadman
Didn't you already ask this question years ago?

not I.

 

[FoBoT]

it doesn't matter
if you are hot, make it cold with the A/C

if you are cold, make it hot with the heater

it doesn't matter how much gas it uses

 

[bonkers325]

generally, AC will lower your mpg by 1 or 2 miles. but driving with your windows down going at highway speeds will also lower your mpg. it really depends

 

[CasioTech]

Originally posted by: FoBoT
it doesn't matter
if you are hot, make it cold with the A/C

if you are cold, make it hot with the heater

it doesn't matter how much gas it uses

lmfao.