ASTM D7603-13
Standard Test Method for Determination of Storage Stability and Compatibility in Automotive Gear Oils

Standard No.

ASTM D7603-13

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7603-23

Latest

ASTM D7603-23

Scope

5.1 To avoid equipment failure, a gear oil should remain a homogeneous liquid and the performance-enhancing additives should not separate out when the oil is stored for an extended period of time.

5.2 In addition, because different oils are often mixed when topping off, gear oils from different manufacturers, or containing different base fluids or performance-enhancing additives should be completely miscible and compatible with each other. Any incompatibility of such mixtures can also result in equipment failure if gelation or additive dropout occurs.

5.3 The test procedures described in this test method are designed to evaluate the performance of gear oils in each of the above circumstances.

5.4 This test method is based on the separate test methods FED-STD-791/3440.1 and FED-STD-791/3440.2. Minor changes have been made to the FED test methods to provide a coherent unified procedure. These changes do not significantly alter the test procedures. This test method has, therefore, potential for use as an alternative to the FED test methods in gear oil specifications such as SAE J2360 and Specification D5760.

1.1 This test method covers the determination of storage stability characteristics and the compatibility of automotive gear lubricants when blended with reference lubricants. The purpose of the test is to determine if performance-enhancing additives separate out under defined conditions.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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.

ASTM D7603-13 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D235 Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• ASTM D5760 Standard Specification for Performance of Manual Transmission Gear Lubricants
• ASTM E1272 Standard Specification for Laboratory Glass Graduated Cylinders
• ASTM E542 Standard Practice for Gravimetric Calibration of Laboratory Volumetric Instruments

ASTM D7603-13 history

• 2023 ASTM D7603-23 Standard Test Method for Determination of Storage Stability and Compatibility in Automotive Gear Oils
• 2013 ASTM D7603-13 Standard Test Method for Determination of Storage Stability and Compatibility in Automotive Gear Oils
• 2010 ASTM D7603-10 Standard Test Method for Determination of Storage Stability and Compatibility in Automotive Gear Oils