That's one thing I forgot to mention... last winter I had a lifter that was "unhappy" in the mornings. Once the engine warmed up it would quiet down, but the first minute or two was pretty noisy.

I put some Marvel Mystery Oil in for about 200 miles before an oil change, seemed to help a little bit, another 4000 miles and another oil change and I haven't heard the lifter in a while. Not sure if it's because of the warmer weather or if I got the sticky lifter to be unsticky.

1993 YJ S, 2.5L I4, 5spd
30x9.50x15 TAKOs on 15x8 American Racing Rock Crawlers