You'll have to wash them eventually, now is def a good time. They'll look much better after a wash because all that dirt and oil will come out and the denim will last longer because oil/sweat buildup breaks down cotton faster. I've seen enough before/after photos to know they always look better after a wash especially after very long time wear like yours.
Right now they look too waxy and must feel slimy and itchy to wear on a humid morning... I can only imagine the festering smell they're omitting. Also, pretty sure even the guys in the mines washed their overalls from time to time. It's just good hygiene.
Denim care must be moderated, if you wash too often it will detract from the beauty but if you go too long without a wash it will also detract from the beauty.
Edited by RRL CLOTHING - 2/23/12 at 7:47am