I've been watching this topic because I'm running AutoRx in a 3.0L sienna. I am at about 850 miles so far. I think I'm supposed to change the filter at 1250 miles but it seems they removed the sludge instructions from the website. However, I don't think I have sludge. I got this engine with 60k miles and the Denso PCV (probably original) was not clogged. The oil on the dipstick is still very light colored FWIW. I plan to cut open the filter at 1250 miles and expect it to be relatively clean.