winter gasoline = increased fuel consumption

cosine

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i've noticed a 1-2 mpg drop.since the colder weather showed up.





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karynm8621

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I’ve never heard of “winter gas” before.

can someone please explain this concept? why is this a thing?
Winter-blend fuel has a higher RVP because the fuel must be able to evaporate at low temperatures for the engine to operate properly, especially when the engine is cold. ... A lower RVP also helps prevent drivability problems such as vapor lock on hot days, especially in older vehicles.
 

geem03

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Worse gas mileage in the winter... even with my dodge ram.... but I do notice better gas mileage when the weather gets milder and then drops with the temperature.... oh well....
 

wibornz

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Also your rolling resistance is higher. Heck the differential fluid is like honey, all the grease in drivetrain bearing are thick. And then the gas is a winter blend.
 

roaniecowpony

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When it gets cold, air up those tires. When it gets hot, air down.
 

ASMSAS

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Yea here in Cali we have a winter blend and we don’t even have a stinkin winter. :asshat:
 

dsgrey

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EPA regs are odd. We have low RVP gas during the summer which is refined to have a lower evaporation rate and lower volatility than conventional gas. I'm not sure if winter or summer blends really make a difference to us anymore. I seem to average around 20mpg anytime of the year with mixed driving.
 

Wabujitsu

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We are “blessed” with winter gas down in FL too. The problem is, the temperature in a 24-hour period can drop from 85 down to 35 - 50 degrees difference - then back up to 85 in two to four days. I’ve noticed maybe a 1-2 MPG less difference.
 

blnewt

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thanks for the link.

does anyone know when this switch takes place?

curious if my mpg is going to go down soon.
Here in New Mexico it's around the start of November through the end of March. Our JL mpg goes down about 10% in winter unless I find a station on our road trips that sells Ethanol-free gas.
 

amnesiac

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Here in New Mexico it's around the start of November through the end of March. Our JL mpg goes down about 10% in winter unless I find a station on our road trips that sells Ethanol-free gas.
I got my Jeep at the end of October. Mpg were around 20, it’s steadily dipped since then and is now at 19. hoping it goes up in a month or so.
 

blnewt

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I got my Jeep at the end of October. Mpg were around 20, it’s steadily dipped since then and is now at 19. hoping it goes up in a month or so.
Maybe you're getting an extra mpg of fun now :)
 

viper88

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Also your rolling resistance is higher. Heck the differential fluid is like honey, all the grease in drivetrain bearing are thick. And then the gas is a winter blend.
BINGO! You hit it on the head. Lower MPG in winter is due to a combination of things. Everything you said plus longer warm up times. Plus the use of remote starters and idling to warm up.
 

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