Wayne Ernst said: "I called my local NAPA guy a few days ago and he was at a loss to identify their equivalent to the Optima Red Top." - - - - - - - - - - - Here in the below zero weather of the mountains of Colorado, high "cold cranking" batteries are a must. Our NAPA store stocks these batteries. Also, Interstate and Excide make the same style batteries with specifications essentially identical to the Optima. And, yes, the prices are from $25 to $40 less than the Optima. My Optima died after 4 years and it's death was due to an improper connection of a "trickle" charger attached by a well meaning friend while I was off pedaling my bicycle around the world last year. So, I have no complaints with the Optima. I have, however, replaced it with the Interstate equivalent. Dick Ryan VIN 16867