Based on my back copies, it appears that the last battery test that CR published was in November, 2013, so these results may no longer be valid. Anyway…here are the top three in each group size:
Group 65:
Kirkland (Costco)
DieHard Gold
DieHard Advanced Gold
Group 34, 78, & 34/78 Dual Terminal:
DieHard Advanced Gold 50778
Optima Yellow Top
DieHard Advanced Gold 50734
Group 24/24F:
Everstart Maxx North (Walmart)
Everstart Maxx South "
DieHard Gold South
Group 35:
Everstart Maxx North (Walmart)
Everstart Maxx South "
Duralast (Auto Zone)
Group 75:
Everstart Maxx South (Walmart)
Interstate Megatron
Everstart Maxx North "
Group 48:
Interstate Megatron Plus
Everstart Maxx (Walmart)
DieHard Gold South