I’ve had fair results with Costco batteries
The price is very reasonable, far cheaper than pep boys, autozone, o’reillys, or napa
3 years free replacement, plus pro-rated
I’ve found them to last about 5 years
I live in southern California, so the heat ensures they don’t live a long life
I have an EXTREMELY mixed opinion about AC Delco batteries. While I find that their factory batteries with the gray label . . . unavailable for “end users” . . . last up to 7 years even in socal heat, the replacement batteries . . . even the “professional” line, will last 5 years tops, with many lasting only a fraction of that time
There’s too things I don’t like about napa batteries . . .
they seem to be priced a little higher than their competition. Much higher, if you’re comparing to Costco prices
their most expensive batteries only have 2 years free replacement