Do you change during the warmer months, or is it always 5-40?

 

I used to switch to 15w-40 for the summer, but I use the 5w-40 in EVERYTHING, my wifes Sedona, moms Escape and its SOOO much easier having only one oil in the garage.
Plus its to hard to time oil changes with the seasons, sometimes I would wind up running the 15w-40 into December and it gets to cold for that here.
So I just started using the 5w-40 all year.
Now if I lived where it was warm all year and never got down below freezing for more than a day or three I'd use the 15w-40 all year.