ASTM D6922 Test Method for Determination of Homogeneity and Miscibility in Automotive Engine Oils
1. Scope
1.1 This test method covers the determination if an automotive engine oil is homogeneous and will remain so, and if it is miscible with certain standard reference oils after being submitted to a prescribed cycle of temperature changes. This test method is very similar to the homogeneity and miscibility test described in FED-STD-791/3470.1.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D97 Test Method for Pour Point of Petroleum Products
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D5844 Test Method for Evaluation of Automotive Engine Oils for Inhibition of Rusting (Sequence IID)
D6557 Test Method for Evaluation of Rust Preventive Characteristics of Automotive Engine Oils
E 1 Specification for ASTM Thermometers
E 344 Terminology Relating to Thermometry and Hydrometry
2.2 Federal Test Method Standard:
FED-STD-791/3470.1 Homogeneity and Miscibility of Oils
3. Terminology
3.1 Definitions:
3.1.1 calibrate, v - to determine the indication or output of a measuring device with the respect of that of a standard.
3.1.2 homogeneity, n - the ability of a test oil itself to remain the same in appearance throughout (uniform) after submission to a series of temperature changes.
3.1.3 miscibility, n - the ability of a reference oil and test oil to form a uniform mixture after blending and not separate into two phases after submission to a series of temperature changes.
3.1.4 reference oil, n - an oil of known performance characteristics, used as a basis for comparison.
3.1.4.1 Discussion - Reference oils are used to calibrate testing facilities, to compare the performance of other oils, or to evaluate other materials (such as seals) that interact with oils.
3.1.5 specimen, n - a piece or portion of test oil used to make a test.
3.1.6 test oil, n - any oil subjected to evaluation in an established procedure.
