Yep. I changed mine at about 45k and they were NASTY!!! Totally black and there were leaves and bugs in there
I knew they were there but didn't realize how fast they get dirty until the guy at the Quick Lube showed me (fyi, I only had an oil change done there because I was in a hurry to SEMA last year and I supplied my own synth oil and filter).
Anyway, I asked how much just for the heck of it, thinking it was going to be $20 or something. Might as well have them do it right?
The guy goes, "It's $50 to change them."
I almost laughed in his face when he said that, but instead I told him I'd do it next time I came
It was less than $20 and took 5 minutes to do....I'm in the wrong business