Decided to go for a first wash. Longest I've ever gone without a wash, by far, at 115 days.
They were getting that slick/greasy feel which I can't stand. No smell though. They also have the beginnings of some crotch blowouts, which is quite unusual in my case. Worn through the back belt loop as well. Seems clear to me (and seems to be common knowledge) that wearing a pair for this long without washing takes more of a toll on the denim.
In the machine now. 40C, no spin, inside out, with some Woolite Dark. Did a fairly long, warm soak first, trying to avoid marbling if I can. The water was surprisingly clear after the soak, and no funny smells
Here are some before pictures. Will take some after pictures tomorrow.
(Right click to open bigger version)