I think stuff settles out faster in warm oil, provided that warming the oil doesn't cause stirring by convection. I have dozens of 4-ounce samples of oil beginning with the first that I collected in November of 2003. Some of the cleanest clearest ones are the very first, that sat in cubees for several months before I took the samples off the top with a baster.
The other day I looked at two recent samples: one from my big settling tank, undisturbed for over a month, and the other some of the same oil after the 0.5 micron bag filter. Both looked very good, but the 0.5 micron was a little clearer. The more settling, the better. Filters last longer.