ASTM D5967-21 - 1.7.2021
 
Significance and Use

5.1?This test method was developed to evaluate the viscometric performance of engine oils in turbocharged and intercooled four-cycle diesel engines. Results are obtained from used oil analysis.

5.2?The test method is used for engine oil specification acceptance when all details of the procedure are followed.

 
1. Scope

1.1?This test method covers an engine test procedure for evaluating diesel engine oils for performance characteristics, including viscosity increase and soot concentrations (loading).2 This test method is commonly referred to as the Mack T-8.

1.2?This test method also provides the procedure for running an extended length T-8 test, which is commonly referred to as the T-8E and an abbreviated length test, which is commonly referred to as T-8A. The procedures for the T-8E and the T-8A are identical to the T-8 with the exception of the items specifically listed in Annex A8 and Annex A9 respectively. Additionally, the procedure modifications listed in Annex A8 and Annex A9 refer to the corresponding section of the T-8 procedure.

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

1.3.1?ExceptionsWhere there is no direct SI equivalent such as the units for screw threads, National Pipe Threads/diameters, tubing size, sole source equipment suppliers, and oil consumption in grams per kilowatt-hour.

1.4?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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A6 for specific safety precautions.

1.5?A Table of Contents follows:

Scope

1

Referenced Documents

2

Terminology

3

Summary of Test Method

4

Significance and Use

5

Apparatus

6

General Description

6.1

The Test Engine

6.2

Mack Test Engine

6.2.1

Engine Cooling System

6.2.2

Engine Oil System

6.2.3

Auxiliary Oil System

6.2.4

Crankcase Aspiration

6.2.5

Blowby Meter

6.2.6

Air Supply and Filtration

6.2.7

Fuel Supply

6.2.8

Intake Manifold Temperature Control

6.2.9

Engine Fluids

7

Test Oil

7.1

Test Fuel

7.2

Engine Coolant

7.3

Cleaning Materials

7.4

Preparation of Apparatus at Rebuild

8

Cleaning of Parts

8.1

Valves, Seats, Guides, and Springs

8.2

Cylinder Liner, Piston, and Piston Ring Assembly

8.3

Injectors and Injection Pump

8.4

Assembly Instructions

8.5

Measurements

8.6

Laboratory and Engine Test Stand Calibration/Non-Reference
Requirements

9

Calibration Frequency

9.1

Calibration Reference Oils

9.2

Test Numbering

9.3

New Laboratories and New Test Stands

9.4

Calibrated Laboratories and Test Stands

9.5

Calibration Test Acceptance

9.6

Failing Calibration Tests

9.7

Non-Reference Oil Test Requirements

9.8

Procedure

10

Pretest Procedure

10.1

Engine Start-Up

10.2

Engine Shutdown

10.3

Test Cycle

10.4

Oil Addition/Drain

10.5

Oil Samples

10.6

Oil Consumption Calculations

10.7

Fuel Samples

10.8

Periodic Measurements

10.9

Blowby

10.10

Centrifugal Oil Filter Mass Gain

10.11

Oil Filter ? P Calculation

10.12

Post Test

10.13

Inspection of Fuel and Oil During Test

11

Oil Inspection

11.1

Fuel Inspections

11.2

Oil Consumption

11.3

Report

12

Reporting Test Results

12.1

Deviations from Test Operational Limits

12.2

Electronic Transmission of Test Results

12.3

Plots of Operational Data

12.4

Precision and Bias

13

Precision

13.1

Bias

13.2

Keywords

14

Annexes

?

Report Forms

Annex A1

Sensor Locations

Annex A2

Kinematic Viscosity At 100 ?C For Test Method D5967 Samples

Annex A3

Enhanced Thermal Gravimetric Analysis (TGA) Procedure

Annex A4

Procurement of Test Materials

Annex A5

Safety Precautions

Annex A6

Data Dictionary

Annex A7

T-8E Extended Length Test Requirements

Annex A8

T-8A Abbreviated Length Test Requirements

Annex A9

Mack T-8A, T-8, and T-8E Fuel Requirements

Annex A10

1.6?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

D613-25a

Standard Test Method for Cetane Number of Diesel Fuel Oil (Includes all amendments and changes 11/6/2025).

D130-26

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

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

D86-23ae2

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

D4175-24e1

Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants (Includes all amendments and changes 11/19/2024).

D4052-22

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

D6278-20a

Standard Test Method for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus (Includes all amendments and changes 6/16/2020).

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

SAE J1995

D4294-24

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

D4485-24

Standard Specification for Performance of Active API Service Category Engine Oils

D4737-21

Standard Test Method for Calculated Cetane Index by Four Variable Equation

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)

D5453-25

Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence

D524-15(2025)e1

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

D235-22

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

D287-22

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

D445-24

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

D664-24

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

D976-21e1

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

D1319-25

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