The Slime came with strings I played for a while, then put D'addario's on it when I changed the bridge out. The bridge had a wobbly saddle, so I bought another one, thru it in the drawer with the whole idea of putting it on when I changed the strings. I just changed them out about a week ago. I do believe it's the first time I've had a set of strings on a guitar for abot a year - lol. No, I'm not trying to say D'addario's only need to be changed once a year, but - they still sounded good, still intonated/sounded true, weren't rusty/discolored, etc. Not that I left them on that long on purpose, I just never seemed to remember to change them every time I remembered I needed to change them - lol. I've just gotta quit letting my tone secrets out of the bag, man...