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07-18-2011, 06:13 PM | #1 |
Drives: 06 Yaris HB CE Join Date: Aug 2009
Location: Toronto
Posts: 501
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Turning on the a/c
I know turning on the a/c decrease fuel economy, is it true the colder you turn the a/c, more fuel it wastes? or does not matter?
And the fans, if I switch it to 4 max setting or the circulation button, does it use more fuel as well? Lastly, does the alternator generate more electricity through fuel burning if the battery is losing charge because I use too much cigarette lighter accessories, or turning the speakers loud? During the summer, it's really hard to resist, I get grumpy when I am sweaty in the car. |
07-18-2011, 06:32 PM | #2 |
Drives: Toyota Belta Join Date: May 2011
Location: Barbados
Posts: 196
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You use more fuel travelling on the highway with your windows down than up using AC. AC systems nowadays are very efficient. There is no place for sweat
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07-18-2011, 07:45 PM | #3 |
Drives: 2010 Yaris Sedan Join Date: Feb 2010
Location: Kansas
Posts: 871
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if the AC is on,it uses X amount of fuel,period. Now that being said, if you turn it warmer, the compressor will cycle on and off,so yes warmer saves fuel. Once it gets comfortable,turn the knob till compressor shuts off and maybe it will save some gas, I dont know how much. As hot as it is here, it doesnt get comfy till I get home, so mine is full blast all the time. 100 degrees at 70+ percent humidity sucks
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07-18-2011, 08:16 PM | #4 |
Drives: 2008 Yaris Hatchback Join Date: Jan 2010
Location: Alabama
Posts: 64
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Yes I run my A/C for the 42 mile commute this year I am avg 41.5 mpg..I will sacrifice fuel mileage for comfort.
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07-19-2011, 11:55 AM | #5 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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i pulse my A/C
i generally leave it cranked for the first like 10 miles until the cabin gets cool, then i pulse it off going up hills & shit averaging over 50+mpg my last 6 tanks
__________________
-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
07-19-2011, 01:53 PM | #6 |
Drives: 06 Yaris HB CE Join Date: Aug 2009
Location: Toronto
Posts: 501
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Actually my average mpg is far less than you guys for some reason when my a/c is not on, a full tank of gas can run 600km(372miles) highway
In surface road, it is close to 475km(295miles) how about you guys? is there a problem with my engine? i never hit 40mpg |
07-19-2011, 02:48 PM | #7 | |
Drives: 2009 Yaris Join Date: Feb 2011
Location: California
Posts: 21
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Quote:
Now I pretty much drive 65-80 with AC on and my last mpg was 34~ |
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07-19-2011, 05:41 PM | #8 | |
Bob
Drives: Yaris and Scion XD 5 spd BSP Join Date: Dec 2009
Location: Was Hawaii - Moved to Everett WA
Posts: 145
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Quote:
Boils down to just more than .5 cents per mile for AC... BARGAIN !!!! |
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07-19-2011, 06:55 PM | #9 | |
Drives: 06 Yaris HB CE Join Date: Aug 2009
Location: Toronto
Posts: 501
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Quote:
anyone jealous? lol |
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07-20-2011, 08:00 AM | #10 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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i average a little over 500miles when i fill up...& thats with usually the second bar left on the gas gauge
__________________
-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
07-20-2011, 05:35 PM | #11 | |
Drives: '08 LB MT Bayou Join Date: Oct 2008
Location: Colorado
Posts: 1,671
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Quote:
I get from 28 to 32 mpg (winter to summer respectively) driving around town. I just did a trip from Colorado to Maryland and back under a variety of conditions and averaged 34.9 for the whole trip. The 40+ numbers you see are operating under ideal conditions and likely using hyper mile techniques. |
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07-20-2011, 06:06 PM | #12 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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The A/C will cycle on and off to maintain a temp range preset by the system at the condenser. It doesn't matter what you set the temperature at because the system heats the air after it's cooled. The higher you set the fan the faster it warms the condenser and the more the system has to cycle to keep cooled, so you use more fuel.
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07-21-2011, 02:04 AM | #13 | |
Drives: 06 Yaris HB CE Join Date: Aug 2009
Location: Toronto
Posts: 501
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Quote:
On the other hand, in winter you dont use the compressor for heat. Does cranking up the fan or turning the heat dial changes fuel efficiency? |
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07-21-2011, 06:14 AM | #14 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Turning the heat up won't change how often the system cycles but turning the fan up will.
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07-21-2011, 12:07 PM | #15 |
Obsessed with 1.5L
Drives: '10 PW Yaris Sedan Join Date: Feb 2011
Location: Westminster, MD
Posts: 907
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i literally have to BEAT THE HELL out of mine to get low 40s per tank, somewhat ideal conditions & hypermiling techniques results in low to mid 50s for me
__________________
-Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr |
07-21-2011, 02:15 PM | #16 |
Drives: 06 Yaris HB CE Join Date: Aug 2009
Location: Toronto
Posts: 501
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07-21-2011, 05:41 PM | #17 |
DWEED
Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008
Location: Arizona
Posts: 1,161
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I get 39-40 in the summer with the air running. It's the winter fuel blend that drops mileage 1 or 2 mpg.
__________________
Making a decision without following it with an action is still a fantasy. |
07-21-2011, 11:19 PM | #18 | |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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Quote:
If you have the defrost on the A/C is running all the time. In the winter it will still cycle if the condenser gets warm enough. Running the heat will only effect warm up time in the winter, which greatly effects millage. I usually don't turn the fan on until the blue light turns off and even then only on low until the car gets up to about 160°. (I have a gauge) |
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