off the top of my head I do believe that the Motorcraft batteries are like 5-600 CCA. A redtop Optima would be 900 CCA.
A few years ago there was a week where it was below zero in CT, never had an issue with the motorcraft battery.
Now if we had 2012 Imprezas (which I do) I might, might have a slight concern. The factory battery is only 315 CCA, iirc.
Don't worry about the battery until it has issues starting the car.
- 12 Focus SE - 5spd
- 99 Contour SeVT <- 3L/NPG Turbo
- 2k Contour SVT - #2137
- 12 Impreza 2.0i Premium - CVT