I also replaced an OEM Ford battery (which lasted about 8 years) with an Optimna as I got tired of adding water and leaks. It was a lucky move as the daughter who moved out of the house is using that car, and I at least don't have to worry about battery maintenance. Now we'll see if it lasts as long.
I'll probably put an Optima in my son's 92 F150 as it looks like the battery had friends over for a leak party.