Winter Gas Causing Drop in MPG? - Page 3 - Toyota Yaris Forums

Yaris Hilton · 01-04-2010, 10:13 AM

Mine does for a good while after the "COOL" light goes out, but it's not actually fully warmed up. After a good long drive, it falls back to a hair over 600 RPM. In a cooler place (it's 19 F here this morning), it might not drop back to normal idle speed.

docB · 01-05-2010, 10:20 AM

If you have the air control set to defrost or defrost/floor, the air conditioning will cycle. That will raise the idle.

YotaYaris · 01-07-2010, 01:55 PM

I filled up this morning at one of my normal spots and what did I see on the pump.....
10% ethanol
That must be why I am down to 39MPG on average. That and more city driving has made me lose about 3-5MPG.

devinlamothe · 01-07-2010, 02:00 PM

Quote:

Originally Posted by YotaYaris

I filled up this morning at one of my normal spots and what did I see on the pump.....
10% ethanol
That must be why I am down to 39MPG on average. That and more city driving has made me lose about 3-5MPG.

At least you don't have 15% everywhere ... it really eats your mileage.

Yaris Hilton · 01-08-2010, 08:04 AM

Quote:

Originally Posted by devinlamothe

At least you don't have 15% everywhere ... it really eats your mileage.

Do you have E15 in Canada?

devinlamothe · 01-08-2010, 08:45 AM

Quote:

Originally Posted by Yaris Hilton

Do you have E15 in Canada?

Yes, at most of the stations where I live it's all E15. There are some with just E10 but not many.

MadMax · 01-07-2010, 07:13 PM

Yeah, I am also in San Antonio and I can't find gas without ethanol anywhere...

Cheers! M2

captainm27 · 01-10-2010, 07:49 AM

I know every car suffers MPG drops in the winter. But why is that? Is it because of the winter blend type of fuel being used? Or does an engine use more gas to stay warmer during the coler months? I drive my Yaris the same gentle way I do in the winter as I do during the warm spring days (with the exception of snow storms, etc.) I never see my RPM's going so much higher to suggest using more fuel. Does the engine use more fuel, even though it is keeping the RPM's at the same levels? Or is RPM just not a good indicator of how much gas is being used?

Bob_VT · 01-10-2010, 07:55 AM

Winter blend fuel, you use the heater (electric more), and in my case I have 4 snows mounted........ not too mention there is more resistance on the roads with slush and snow...... longer warm-ups.....

I usually average 36-38 in the winter and during real bad weather as low as 32

captainm27 · 01-10-2010, 08:00 AM

I can see the winter blend fuel, that's what I think is affecting the most. I didn't know the heater requires that much more energy. During the spring and summer, I have my fans / AC blowing all the time. I usually don't warm up the car. Just turn on, shift to drive, and go. I can understand the slush and snow, but for the most part, here in NJ, when it snows, by the next day most roads are cleared. Hmm......

Bob_VT · 01-10-2010, 08:09 AM

Well, my "cool" light takes longer to turn off in the winter so the engine is not up to temperature as fast. The tires do not expand and heat up in the winter either.

b_hickman11 · 01-10-2010, 12:23 PM

Your engine likes warm and hot air to be brought into it from the intake. The hotter it is outside, the better mpg's you will get. I recorded my best mpg on a day it was 105+ degrees outside.

MadMax · 01-30-2010, 02:24 PM

Quote:

Originally Posted by b_hickman11

Your engine likes warm and hot air to be brought into it from the intake. The hotter it is outside, the better mpg's you will get. I recorded my best mpg on a day it was 105+ degrees outside.

Maybe that explains the good mileage I got this past summer, when we had all those 100+ degree days...

I can't wait for those days to return!

Hard_Yaris · 01-30-2010, 07:06 PM

So in this case Hot Air is Good!

BailOut · 01-30-2010, 07:34 PM

Quote:

Originally Posted by b_hickman11

Your engine likes warm and hot air to be brought into it from the intake. The hotter it is outside, the better mpg's you will get. I recorded my best mpg on a day it was 105+ degrees outside.

Precisely. This is why many of us hypermilers block our grilles in the cold months, and why some also set up DIY warm air intakes.

docB · 03-18-2010, 08:17 PM

Quote:

Originally Posted by b_hickman11

Your engine likes warm and hot air to be brought into it from the intake. The hotter it is outside, the better mpg's you will get. I recorded my best mpg on a day it was 105+ degrees outside.

Was this mileage determination made with a Scan Gage or be refilling the tank?
doc

b_hickman11 · 03-19-2010, 12:44 AM

Quote:

Originally Posted by docB

Was this mileage determination made with a Scan Gage or be refilling the tank?
doc

By refilling the tank with the last bar started blinking and divided miles driven by amount of gas filled.

Hershey · 01-10-2010, 12:38 PM

winter is good for nothing

.

01-07-2010, 01:55 PM	#3
YotaYaris Drives: 09 3dr (sold), 12 SE 5spd : ) Join Date: May 2009 Location: SA TX Posts: 140	I filled up this morning at one of my normal spots and what did I see on the pump..... 10% ethanol That must be why I am down to 39MPG on average. That and more city driving has made me lose about 3-5MPG. __________________ Its all about the MPG's !!

01-10-2010, 07:49 AM	#8
captainm27 Drives: 2008 Sedan A/T Silver Join Date: Nov 2008 Location: New Jersey Posts: 202	Why do I get terrible gas mileage in the winter? I know every car suffers MPG drops in the winter. But why is that? Is it because of the winter blend type of fuel being used? Or does an engine use more gas to stay warmer during the coler months? I drive my Yaris the same gentle way I do in the winter as I do during the warm spring days (with the exception of snow storms, etc.) I never see my RPM's going so much higher to suggest using more fuel. Does the engine use more fuel, even though it is keeping the RPM's at the same levels? Or is RPM just not a good indicator of how much gas is being used?

01-10-2010, 07:55 AM	#9
Bob_VT View User's Garage Drives: 08 Yaris LB Join Date: Oct 2008 Location: Vermont Posts: 1,704	Winter blend fuel, you use the heater (electric more), and in my case I have 4 snows mounted........ not too mention there is more resistance on the roads with slush and snow...... longer warm-ups..... I usually average 36-38 in the winter and during real bad weather as low as 32 __________________ some people are little slinkies. . . . .they are really good for nothing. . . .but they still bring a smile to your face when you push them down a flight of stairs. Come to the DARKSIDE..... We have candy

01-10-2010, 08:09 AM	#11
Bob_VT View User's Garage Drives: 08 Yaris LB Join Date: Oct 2008 Location: Vermont Posts: 1,704	Well, my "cool" light takes longer to turn off in the winter so the engine is not up to temperature as fast. The tires do not expand and heat up in the winter either. __________________ some people are little slinkies. . . . .they are really good for nothing. . . .but they still bring a smile to your face when you push them down a flight of stairs. Come to the DARKSIDE..... We have candy

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Economy	swng	Fuel Economy Forum	2089	01-23-2015 07:41 PM
My progression into hypermiling	BailOut	General Yaris / Vitz Discussion	8	10-13-2009 07:31 PM
Do you get about 4 MPG less during winter ?	paraganek	Fuel Economy Forum	24	05-18-2009 10:52 AM
Anyone from Missouri? MPG problems inside	4MPG	Fuel Economy Forum	31	12-17-2008 06:48 PM
Free gas for any vehicle.	ketel0ne	General Yaris / Vitz Discussion	4	09-19-2006 09:07 AM

01-04-2010, 10:13 AM	#1
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Mine does for a good while after the "COOL" light goes out, but it's not actually fully warmed up. After a good long drive, it falls back to a hair over 600 RPM. In a cooler place (it's 19 F here this morning), it might not drop back to normal idle speed.

01-05-2010, 10:20 AM	#2
docB Drives: '09 Yaris Sedan Join Date: Oct 2009 Location: Western N.Y. Posts: 75	If you have the air control set to defrost or defrost/floor, the air conditioning will cycle. That will raise the idle.

01-07-2010, 07:13 PM	#7
MadMax Drives: 2008 Yaris Liftback (Sprocket) Join Date: Oct 2008 Location: San Antonio, Texas! Posts: 2,799	Yeah, I am also in San Antonio and I can't find gas without ethanol anywhere... Cheers! M2

01-10-2010, 08:00 AM	#10
captainm27 Drives: 2008 Sedan A/T Silver Join Date: Nov 2008 Location: New Jersey Posts: 202	I can see the winter blend fuel, that's what I think is affecting the most. I didn't know the heater requires that much more energy. During the spring and summer, I have my fans / AC blowing all the time. I usually don't warm up the car. Just turn on, shift to drive, and go. I can understand the slush and snow, but for the most part, here in NJ, when it snows, by the next day most roads are cleared. Hmm......

01-10-2010, 12:23 PM	#12
b_hickman11 Drives: 08 Sedan Join Date: Oct 2008 Location: Tyler, TX Posts: 899	Your engine likes warm and hot air to be brought into it from the intake. The hotter it is outside, the better mpg's you will get. I recorded my best mpg on a day it was 105+ degrees outside.

01-30-2010, 07:06 PM	#14
Hard_Yaris Drives: 07 Yaris Join Date: Dec 2009 Location: Edmonton Alberta Posts: 109	So in this case Hot Air is Good!

01-10-2010, 12:38 PM	#18
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	winter is good for nothing .