I had the exact same results, with the exact same change
in mileage as you had.

Though, my mileage did bounce back a bit, when we had a
brief "warm" spell.

--- In Hybrid_Mercury_Mariner@yahoogroups.com, "welovetoys2001"
<welovetoys2001@...> wrote:
>
> so, those of you out there in the cold weather, have you noticed a
> considerable drop in MPG since winter hit?
>
> mine went down significantly and am wondering if i need to get it
> checked... or if this is the reaction to the cold weather
>
> went from a steady 31mpg to as low as 26mpg :-(
>
> nancy in ny
>