Somewhat disappointed - Page 2 - Toyota Yaris Forums

TheRealEnth · 09-21-2009, 02:55 PM

lawl

YarisOwnersDad · 09-21-2009, 03:06 PM

Quote:

Originally Posted by thebarber

a/c on at 80F? you made of butter? lol

I guess I am more of a cool weather person. So what am I doing in western KY????

Actually, a good portion of the time the A/C was on was because I was in defrost mode to keep the inside of the windows and windshield from fogging up. It was VERY humid, even foggy outside for part of the trip. When I tried to go get out of defrost mode, the windows would immediately fog.

Tom

thebarber · 09-21-2009, 03:32 PM

Quote:

Originally Posted by YarisOwnersDad

I guess I am more of a cool weather person. So what am I doing in western KY????

Actually, a good portion of the time the A/C was on was because I was in defrost mode to keep the inside of the windows and windshield from fogging up. It was VERY humid, even foggy outside for part of the trip. When I tried to go get out of defrost mode, the windows would immediately fog.

Tom

i was just bustin' your balls

i dig, humidity sucks...but its been a dry summer in southern ontario

supmet · 09-21-2009, 03:46 PM

Quote:

Originally Posted by YarisOwnersDad

When I tried to go get out of defrost mode, the windows would immediately fog.

I hope you realize if you never had the A/C on in the first place they wouldn't fog, and if you left the A/C off for more than 2 minutes it would take care of itself...

User created self sustaining problems ftw.

YarisOwnersDad · 09-21-2009, 04:05 PM

Quote:

Originally Posted by supmet

I hope you realize if you never had the A/C on in the first place they wouldn't fog, and if you left the A/C off for more than 2 minutes it would take care of itself...

User created self sustaining problems ftw.

Not so sure about that. Have you ever experienced the extremely high humidity of the Midwest? It SUCKS. The dew point is much higher around here than what you are accustomed to, I'm sure, since your sig says you are in southern CA.

It was in the very early hours of the morning, while the outside temperatures were still in the low to mid 60s, when I was using the defrost mode.

Tom

supmet · 09-21-2009, 05:00 PM

Quote:

Originally Posted by YarisOwnersDad

Not so sure about that. Have you ever experienced the extremely high humidity of the Midwest? It SUCKS. The dew point is much higher around here than what you are accustomed to, I'm sure, since your sig says you are in southern CA.

It was in the very early hours of the morning, while the outside temperatures were still in the low to mid 60s, when I was using the defrost mode.

Tom

I've lived in wisconsin, and my mom lives in chicago. Dew point/humidity is only really an issue because you are creating a difference in temperature between the water molecules in the air and your windshield.

edit: I've pretty much driven the gamut of humidities, from death valley and vegas to the midwest. The A/C has never been "required" to keep the windshield from fogging. You're making a cold windshield with the A/C, which INCREASES condensation. Having a windshield the same temp as the outside air creates the least amount of condensation, regardless of humidity.

talnlnky · 09-21-2009, 05:34 PM

I think the OP's car is on par. I noticed you had it on cruise... if you had any significant down hill portions (long distances) of highway, then I'd say take it out of cruise.... unless the auto can manage DFCO in cruise control.... Can it? I dunno, I don't have an auto, it wouldn't surprise me though if you had to be out of cruise.

In my car this is a huge difference in speed/economy once you get over 50-55mph. and REALLY big once you hit 70mph.

*tomato* · 09-21-2009, 05:45 PM

the AC seems to make a difference as well. Other posters have reported lesser fuel economy while using the AC in other threads.

Still, 40 MPG is really good IMO! Hope the OP isn't thinking of trading in already

alch3miss · 09-21-2009, 05:45 PM

Sounds pretty normal, all things considered.

YarisOwnersDad · 09-21-2009, 06:52 PM

Quote:

Originally Posted by supmet

I've lived in wisconsin, and my mom lives in chicago. Dew point/humidity is only really an issue because you are creating a difference in temperature between the water molecules in the air and your windshield.

edit: I've pretty much driven the gamut of humidities, from death valley and vegas to the midwest. The A/C has never been "required" to keep the windshield from fogging. You're making a cold windshield with the A/C, which INCREASES condensation. Having a windshield the same temp as the outside air creates the least amount of condensation, regardless of humidity.

Sup:

I think I caused all of this confusion by the way I worded the post when I said the A/C was on all the time. When the defroster is on, the A/C compressor is being used, so I count that the same as using the A/C as far as the effect on MPG.

We both know that condensation occurs when the glass is at a temperature lower than the dew point of the air in contact with it. From the way I worded my post, you apparently thought that the reason the glass was colder than the dew point temperature of the air in the cabin was because I had been using the A/C. That was not the case. The glass temperature was just naturally cold because of the outside temperature. This was before sunrise, and the outside air was probably in the low to mid 60s.

Tomster

minicorolla · 09-21-2009, 08:51 PM

I quit using the speed control. much better mileage after that. feathering the throttle, coasting downhill, sometimes draft behind trucks but way back 'cuz it's not safe and can't see what's on the road coming up. Try it. Helped me out.

Yarold n Kumar · 09-21-2009, 08:56 PM

I think it's hilarimous that the title of the post contains "disappointed" and you're averaging 40 mpg. Just goes to show what some solid engineering can do to raise expectations. I've got to say, I'm disappointed if I ever get below 36 mpg, and that's a thought I never would have had before I got this car.

yarii ftw

YarisOwnersDad · 09-21-2009, 09:11 PM

Quote:

Originally Posted by Yarold n Kumar

I think it's hilarimous that the title of the post contains "disappointed" and you're averaging 40 mpg. Just goes to show what some solid engineering can do to raise expectations. I've got to say, I'm disappointed if I ever get below 36 mpg, and that's a thought I never would have had before I got this car.

yarii ftw

That's the truth! How can I be disappointed with 40.5 MPG? That truly is a testimony to the super fuel efficiency of the Yaris.

Tom

Woody_Woodchuck · 09-22-2009, 08:24 AM

Hey Tom. I live in a pretty humid area and do this for the windshield fogging in that situation of cool mornings. Mornings, when I first start out I will turn to defrost heat full and fan full. It will fog worse for a minute maybe two then defog itself. I also usually need to have the windshield wipers on while warming the windshield. I turn the fan off, leaving it on defrost mode and then set the temp to center (pointing straight up). You don’t want the temp too low because, well, you know. If condensation starts I play with the fan settings, usually 1 or 2 does the trick. Sometimes I have to turn the heat up a notch. Seems the trick is to just keep a small flow of air going to the windshield, having the fan off but in defrost position will do this.

On those really hot humid mornings, 85 F, 99.9% humidity, crack the drivers window one and a half cranks, passenger side one full crank down. Follow the above procedure (yes I know it is making the car hotter!) but when cleared you can turn on the AC. Sometimes I can get away with just the drivers window open, sometimes I need both cracked a bit to get circulation going. Later in the day no need to have the windows cracked open but something about the mornings it needs it. I’m thinking it has to do with moisture already being inside the vehicle and I need to get rid of it.

YarisOwnersDad · 09-22-2009, 08:29 AM

Thanks, Woody.

Isn't it true that whenever the switch is in the defrost position, the A/C compressor is on? If so, then we might as well have cold air and be comfortable, right?

I could be wrong about that. Woody, or anyone else, is what I said above true or not?

Tomster

Woody_Woodchuck · 09-22-2009, 09:19 AM

Could be but I do not notice the huge (6 to 8 mpg) drop in mileage with it in that position compared to when I actually have cold air blowing out. Even with the fan on there is no noticeable difference in mileage, only when I hit the AC button. Mine is in the defrost position most of my driving time and I have a pretty good mpg average.

Lafiro · 09-22-2009, 01:32 PM

LOL, haha nice one!

Actually even at 70degrees here in NYC like last night, had to have the a/c the entire time because humidity way very high, windows would fog up quickly if not.

I usually have a LOT of traffic, lots of stops and goes because of stop signs every block pretty much, and some nice 70mph highway driving at times, hard acceleration(meaning shofting at 2-3k rpm) not abusing it... I usually come out to 27-29mpg average. This is not really dependant on temperature or a/c usage, and I have 17" rims with 205 tires. Probably around 34psi.

Lafiro · 09-22-2009, 01:34 PM

oh, shooooot, edit again:

I just changed my oil to 5w-20 royal purple with k&n filter. I will also be pushing the PSI up to around 40. Lets see what happens in the next few tanks!

09-21-2009, 02:55 PM	#19
TheRealEnth Beast View User's Garage Drives: 2007 Blz Blu LB Join Date: Oct 2008 Location: Miami, FL Posts: 1,365	lawl __________________ One you've taken a yaris for a spin, there's no turning back. Its a Chao!!!

09-21-2009, 05:34 PM	#25
talnlnky Audio Junky Drives: 08 liftback Join Date: Oct 2008 Location: Spokane, Wa Posts: 1,412	I think the OP's car is on par. I noticed you had it on cruise... if you had any significant down hill portions (long distances) of highway, then I'd say take it out of cruise.... unless the auto can manage DFCO in cruise control.... Can it? I dunno, I don't have an auto, it wouldn't surprise me though if you had to be out of cruise. In my car this is a huge difference in speed/economy once you get over 50-55mph. and REALLY big once you hit 70mph. __________________

09-21-2009, 05:45 PM	#26
tomato Super Moderator View User's Garage Drives: Yaris 2DR LB 07, MT, Abs. Red Join Date: Feb 2009 Location: San Francisco Bay Area Posts: 5,155	the AC seems to make a difference as well. Other posters have reported lesser fuel economy while using the AC in other threads. Still, 40 MPG is really good IMO! Hope the OP isn't thinking of trading in already __________________ Follow Bamboo the YarisWorld Traveler here Last edited by tomato; 09-21-2009 at 06:06 PM.

09-21-2009, 05:45 PM	#27
alch3miss View User's Garage Drives: Toyota Yaris Join Date: Dec 2008 Location: Long Island Posts: 235	Sounds pretty normal, all things considered. __________________ http://www.youtube.com/user/ProjectYaris

09-22-2009, 08:24 AM	#32
Woody_Woodchuck Drives: 2008 Yaris LB 5M Join Date: Oct 2008 Location: Wake Forest, NC Posts: 64	Hey Tom. I live in a pretty humid area and do this for the windshield fogging in that situation of cool mornings. Mornings, when I first start out I will turn to defrost heat full and fan full. It will fog worse for a minute maybe two then defog itself. I also usually need to have the windshield wipers on while warming the windshield. I turn the fan off, leaving it on defrost mode and then set the temp to center (pointing straight up). You don’t want the temp too low because, well, you know. If condensation starts I play with the fan settings, usually 1 or 2 does the trick. Sometimes I have to turn the heat up a notch. Seems the trick is to just keep a small flow of air going to the windshield, having the fan off but in defrost position will do this. On those really hot humid mornings, 85 F, 99.9% humidity, crack the drivers window one and a half cranks, passenger side one full crank down. Follow the above procedure (yes I know it is making the car hotter!) but when cleared you can turn on the AC. Sometimes I can get away with just the drivers window open, sometimes I need both cracked a bit to get circulation going. Later in the day no need to have the windows cracked open but something about the mornings it needs it. I’m thinking it has to do with moisture already being inside the vehicle and I need to get rid of it. __________________ Lifetime log

09-21-2009, 08:51 PM	#29
minicorolla Drives: 2008 Sedan White Join Date: Oct 2008 Location: Ohio Posts: 54	I quit using the speed control. much better mileage after that. feathering the throttle, coasting downhill, sometimes draft behind trucks but way back 'cuz it's not safe and can't see what's on the road coming up. Try it. Helped me out.

09-21-2009, 08:56 PM	#30
Yarold n Kumar View User's Garage Drives: 2009 3dr lb Join Date: May 2009 Location: Brooklyn Posts: 45	I think it's hilarimous that the title of the post contains "disappointed" and you're averaging 40 mpg. Just goes to show what some solid engineering can do to raise expectations. I've got to say, I'm disappointed if I ever get below 36 mpg, and that's a thought I never would have had before I got this car. yarii ftw

09-22-2009, 08:29 AM	#33
YarisOwnersDad Is now a Corolla S Owner View User's Garage Drives: 2010 Corolla S Join Date: Mar 2009 Location: Western Kentucky Posts: 460	Thanks, Woody. Isn't it true that whenever the switch is in the defrost position, the A/C compressor is on? If so, then we might as well have cold air and be comfortable, right? I could be wrong about that. Woody, or anyone else, is what I said above true or not? Tomster

09-22-2009, 09:19 AM	#34
Woody_Woodchuck Drives: 2008 Yaris LB 5M Join Date: Oct 2008 Location: Wake Forest, NC Posts: 64	Could be but I do not notice the huge (6 to 8 mpg) drop in mileage with it in that position compared to when I actually have cold air blowing out. Even with the fan on there is no noticeable difference in mileage, only when I hit the AC button. Mine is in the defrost position most of my driving time and I have a pretty good mpg average. __________________ Lifetime log

09-22-2009, 01:32 PM	#35
Lafiro Drives: 06 Yaris Sedan Join Date: Jun 2006 Location: NYC Posts: 694	LOL, haha nice one! Actually even at 70degrees here in NYC like last night, had to have the a/c the entire time because humidity way very high, windows would fog up quickly if not. I usually have a LOT of traffic, lots of stops and goes because of stop signs every block pretty much, and some nice 70mph highway driving at times, hard acceleration(meaning shofting at 2-3k rpm) not abusing it... I usually come out to 27-29mpg average. This is not really dependant on temperature or a/c usage, and I have 17" rims with 205 tires. Probably around 34psi.

09-22-2009, 01:34 PM	#36
Lafiro Drives: 06 Yaris Sedan Join Date: Jun 2006 Location: NYC Posts: 694	oh, shooooot, edit again: I just changed my oil to 5w-20 royal purple with k&n filter. I will also be pushing the PSI up to around 40. Lets see what happens in the next few tanks!