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Current AC Delco is at 8 years.
I've also had really good luck with Motomaster batteries too believe it or not.
I also had an Interstate last 9 years.Interstate Battery. That’s the only name in batteries that I trust. They have the highest quality standards. We had one last 10 years the other last 8 and now we’re on the third and fourth ones. Won’t buy anything else. I understand there are few battery manufacturers but Interstate has the highest standards. I’d avoid a Walmart battery never had good luck with them. It’s not just to knock Walmart cause I’m not at all it’s just their batteries aren’t good because they don’t pay for high standards. If I had to get something else it would be a Duralast or Napa battery they are generally pretty high quality and standards.
Current AC Delco is at 8 years.
I've also had really good luck with Motomaster batteries too believe it or not.