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.I’ve never heard of “winter gas” before.
can someone please explain this concept? why is this a thing?
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.thanks for the link.
does anyone know when this switch takes place?
curious if my mpg is going to go down soon.
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.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.
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.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.