ASTM D5966-99 - 10.6.1999
 
1. Scope

1.1 This engine lubricant test method is commonly referred to as the Roller Follower Wear Test. Its primary result, roller follower shaft wear in the hydraulic valve lifter assembly, has been correlated with vehicles used in stop-and-go delivery since prior to 1993. It is one of the test methods required to evaluate lubricants intended to satisfy the API CG-4 performance category. This test has also been referred to as the 6.2 L Test.

1.2 The values of units used in this test method are stated in either inch-pound units or SI units and are to be regarded separately as the 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.

 
2. Referenced Documents

D524-15(2025)e1

Standard Test Method for Ramsbottom Carbon Residue of Petroleum Products (Includes all amendments and changes 8/11/2025).

D287-22

Standard Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer/Method)

D97-17b(2022)

Standard Test Method for Pour Point of Petroleum Products (Includes all amendments and changes 11/29/2022).

D93-26

Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester

D130-26

Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test

D235-22

Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

D613-26

Standard Test Method for Cetane Number of Diesel Fuel Oil

D86-23ae2

Standard Test Method for Distillation of Petroleum Products and Liquid Fuels at Atmospheric Pressure (Includes all amendments and changes 11/4/2024).

D445-26

Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D446-24

Standard Specifications and Operating Instructions for Glass Capillary Kinematic Viscometers

D482-25

Standard Test Method for Ash from Petroleum Products

D7422-25

Standard Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

MC96.1

Temperature Measurement Thermocouples

D5185-26

Standard Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

D4737-21

Standard Test Method for Calculated Cetane Index by Four Variable Equation

D976-21e1

Standard Test Method for Calculated Cetane Index of Distillate Fuels (Includes all amendments and changes 2/23/2023).

D1319-26

Standard Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption

D2274-14(2019)

Standard Test Method for Oxidation Stability of Distillate Fuel Oil (Accelerated Method)

D2500-23

Standard Test Method for Cloud Point of Petroleum Products and Liquid Fuels

D2622-26

Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry

D2709-22

Standard Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge

D4052-22

Standard Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

D4175-24e2

Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants (Includes all amendments and changes 6/9/2026).

D664-24

Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration

D4485-24

Standard Specification for Performance of Active API Service Category Engine Oils