I was a Public Works fleet manager for 37 years before I semi retired and went to a new career ( needed the extra money to play with my mopars ). At our shop we tried every battery imanginable over the years in 1/2 tons to 10 ton snowplows. We found that the delco batteries gave us the best service life. I have one over 10 years old in my 68 Runner. Having said that I was talking to my local NAPA store owner a while back about batteries and he claims delco is not as good as it once was as they have contracted out the manufacturing to a lesser facility. I have no idea if this is correct or not.