ASTM D6922

Apparatus for the determination of homogeneity and miscibility in automotive engine oils. It is important that engine oils from different manufacturers be homogenous and miscible with each other, because operators of automotive engines often do not have prior knowledge of the manufacture of the oil that is currently used in their application, and engine failure can occur if oils are combined that do not stay homogenous and function properly. For this test method visual color determinations and observations are made on an undiluted test oil specimen, along with six blends of the same test oil that have been combined with specific reference oils at room temperature after the samples have been preheated to 46°C in a TC16 liquid bath. Then manually (as this is the referee method), the pour point of the samples is determined using single and adjustable Tamson TLC40-14(s) and/or TLC80-14(s).