Standard Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine
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.
1.1 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 Exceptions—Where 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 and health 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:
Summary of Test Method
Significance and Use
The Test Engine
Mack Test Engine
Engine Cooling System
Engine Oil System
Auxiliary Oil System
Air Supply and Filtration
Intake Manifold Temperature Control
Preparation of Apparatus at Rebuild
Cleaning of Parts
Valves, Seats, Guides, and Springs
Cylinder Liner, Piston, and Piston Ring Assembly
Injectors and Injection Pump
Laboratory and Engine Test Stand Calibration/Non-Reference Requirements
Calibration Reference Oils
New Laboratories and New Test Stands
Calibrated Laboratories and Test Stands
Calibration Test Acceptance
Failing Calibration Tests
Non-Reference Oil Test Requirements
Oil Consumption Calculations
Centrifugal Oil Filter Mass Gain
Oil Filter Δ P Calculation
Inspection of Fuel and Oil During Test
Reporting Test Results
Deviations from Test Operational Limits
Electronic Transmission of Test Results
Plots of Operational Data
Precision and Bias
Kinematic Viscosity At 100°C For Test Method D5967 Samples
Enhanced Thermal Gravimetric Analysis (TGA) Procedure
Procurement of Test Materials
T-8E Extended Length Test Requirements
T-8A Abbreviated Length Test Requirements
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