High and Low Temperature Stability

While  separation  of  additives at  low  temperatures  might  influence  either  pour  points of low  temperature  fluidity, fed. Test Method 3460 is primarily concerned with the stability of blends. The method is used  to  determine  the  tendency  of the  components of  blended oils to  be  incompatible  when  subjected to  temperature cycling. It  consists  of heating  the  sample  of  oil to  205 degree F for  24 hours, cooling it  to  0 degree F for  16  hours,  storing  it at  room  temperature for  10  days and  examining  it  for  changes in appearance.