AC delco used to be the best IMO, they lasted long .
But now my srervice manager friend at the dealer, who has Delco batteries on the shelf, told me to stay away from them.
Lots of terminals coming loose on them, quality has gone down the tubes at Delco.
I'll be buying interstate when i need some.
BTW the Red top optimas are crap now also. Seems they lose their charge sitting on the shelf so long. When they first came out they were great!
Weve went thru 3 red tops in one year.