Hmmm. Anytime I've seen something like that it's because of water left in the oil. But several flushes should've taken care of that, and it's not like water can hide in the oil, it's pretty obvious. I wonder if something could be wrong that's causing a lean condition, or if a bunch of contaminated oil could damage the screen on the oil pickup.
08 700XX (Gray, L8ton Racing Stealth Bumper, 13 tooth, 21" Razr2 fronts, stock rears, Precision Pro stabilizer, Fox Evols and Podium Xs, Teixeira Tech stock-length upper A-arms, Teixeira Tech stem, L8ton Racing 9/16ths sway bar, ProTaper Contour bar, Shock & Vibe clamps, EHS lid & programmer, HID headlights)
08 Outlander 800
08 Yamaha Big Bear 400 4x4