Winter Gas Causing Drop in MPG? - Page 4 - Toyota Yaris Forums

Hard_Yaris · 01-30-2010, 01:11 PM

Here in Edmonton We get good week long cold snaps of -20C.

I never let my car Idle long, and have never had to plug it in even at -35C... It started with a few more turnovers.

My question would be: Would it help with millage to have a warmer engine bay with temperatures of -20 and lower?
I find my water Temp to be around 85C when its that cold.

docB · 03-18-2010, 08:15 PM

Quote:

Originally Posted by captainm27

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?

Everything needs to warm up. Oil, grease, water, and the passengers. All that heat plus wipers and defrosters use up extra fuel. The DEF mode for the HVAC runs the air conditioner, too. The snow on the road offers a tremendeous drag that needs to be overcome.
doc

Hershey · 03-19-2010, 01:10 AM

Quote:

Originally Posted by docB

Everything needs to warm up. Oil, grease, water, and the passengers. All that heat plus wipers and defrosters use up extra fuel. The DEF mode for the HVAC runs the air conditioner, too. The snow on the road offers a tremendeous drag that needs to be overcome.
doc

would think the cold could affect wheel bearing grease as well . Making for more resistance . No ?

Uber_Otter · 03-19-2010, 01:21 PM

Dallas just switched back over to summer gas. I think. Got a 3 mpg gain on my last tank. Drove the same. Maybe they use Daylight savings as the cutover.

Yaris Hilton · 03-19-2010, 02:39 PM

Might've had a difference in your fill levels at the beginning and end of that tank, or a different driving profile. It's a little early for the change, I think. (It's still Winter.)

Hershey · 03-17-2010, 11:50 PM

usually in APRIL . Flowers bloom as do gas prices .

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01-30-2010, 01:11 PM	#1
Hard_Yaris Drives: 07 Yaris Join Date: Dec 2009 Location: Edmonton Alberta Posts: 109	Here in Edmonton We get good week long cold snaps of -20C. I never let my car Idle long, and have never had to plug it in even at -35C... It started with a few more turnovers. My question would be: Would it help with millage to have a warmer engine bay with temperatures of -20 and lower? I find my water Temp to be around 85C when its that cold.

03-19-2010, 01:21 PM	#4
Uber_Otter Drives: Black XA not yaris but close Join Date: Jun 2009 Location: DFW Posts: 48	Dallas just switched back over to summer gas. I think. Got a 3 mpg gain on my last tank. Drove the same. Maybe they use Daylight savings as the cutover.

03-19-2010, 02:39 PM	#5
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Might've had a difference in your fill levels at the beginning and end of that tank, or a different driving profile. It's a little early for the change, I think. (It's still Winter.)

03-17-2010, 11:50 PM	#6
Hershey Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009 Location: northeast Posts: 2,897	usually in APRIL . Flowers bloom as do gas prices .