MPG change with weather

[JimmyDee]

mine's lost more like five mpg

That is closer to what I loose in Michigan cold. Loose 3-4 with the car.
Jim

 

[atk]

on the average i loose 2-3 mpg in the winter, but i do loose about 5-6 having the truck in 4x4 and the snow plow on....

 

[RoyBoy]

I lose quite a bit of mileage too, but my truck idles all day sometimes