5.1 This test method was developed to evaluate automotive engine oils for protection against oil thickening and engine wear during moderately high-speed, high-temperature service.
5.2 The increase in oil viscosity obtained in this test indicates the tendency of an oil to thicken because of oxidation. In automotive service, such thickening can cause oil pump starvation and resultant catastrophic engine failures.
5.3 The deposit ratings for an oil indicate the tendency for the formation of deposits throughout the engine, including those that can cause sticking of the piston rings in their grooves. This can be involved in the loss of compression pressures in the engine.
5.4 The camshaft and lifter wear values obtained in this test provide a measure of the anti-wear quality of an oil under conditions of high unit pressure mechanical contact.
5.5 The test method was developed to correlate with oils of known good and poor protection against oil thickening and engine wear. Specially formulated oils that produce less than desirable results with unleaded fuels were also used during the development of this test.
5.6 The Sequence IIIG engine oil test has replaced the Sequence IIIF test and can be used in specifications and classifications of engine lubricating oils, such as the following:
5.6.1 Specification D4485,
5.6.2 Military Specification MIL-PRF-2104, and
5.6.3 SAE Classification J183.
Область применения1.1 This test method covers an engine test procedure for evaluating automotive engine oils for certain high-temperature performance characteristics, including oil thickening, varnish deposition, oil consumption, as well as engine wear. Such oils include both single viscosity grade and multiviscosity grade oils that are used in both spark-ignition, gasoline-fueled engines, as well as in diesel engines.
1.1.1 Additionally, with nonmandatory supplemental requirements, a IIIGA Test (Mini Rotary Viscometer and Cold Cranking Simulator measurements), a IIIGVS Test (EOT viscosity increase measurement), or a IIIGB Test (phosphorous retention measurement) can be conducted. These supplemental test procedures are contained in Appendixes Appendix X1, Appendix X2, and Appendix X3, respectively.
Note 1—Companion test methods used to evaluate engine oil performance for specification requirements are discussed in SAE J304.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, and tubing size.
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. Specific warning statements are provided in 6.14.1.1 and 7.1.
1.4 This test method is arranged as follows:
Section
Introduction
Scope
Referenced Documents
Terminology
Summary of Test Method
Significance and Use
Apparatus
Laboratory
Drawings
Specified Equipment
Test Engine
Engine Parts
Engine Speed and Load Control
Fluid Conditioning Module
Engine Cooling System
Flushing Tank
Coolant Mixing Tank
Condenser Cooling Systems
Engine Oil-Cooling System
Fuel System
Induction Air Supply Humidity, Temperature, and Pressure
Temperature Measurement
Thermocouple Location
Air-to-Fuel Ratio Determination
Injector Flow Testing
Exhaust and Exhaust Back Pressure Systems
Blowby Flow Rate Measurement
Pressure Measurement and Sensor Location
Reagents and Materials
Test Fuel
Engine and Condenser Coolant
Coolant Additive
Coolant Preparation
Pre-Test Cleaning Materials
Sealing and Anti-seize Compounds
Test Oil Sample Requirements
Preparation of Apparatus
Condenser Cleaning
Intake Manifold Cleaning
Cleaning of Engine Parts (other than the block and heads)
Connecting Rod Cleaning
Engine Block Cleaning
Cylinder Head Cleaning
Engine Build-up Procedure
General Information
Special Parts
Hardware Information
Fastener Torque Specifications and Torquing Procedures
Main Bearing Cap Bolts
Cylinder Head Bolts
Torques for Miscellaneous Bolts, Studs, and Nuts
Parts Replacement
Engine Block Preparation
Piston Fitting and Numbering
Piston Ring Fitting
Pre-Test Camshaft and Lifter Measurements
Camshaft Bearing Installation
Camshaft Installation
Main Bearings
Crankshaft Installation
Main Bearing Cap Installation
Crankshaft Sprocket
Camshaft Sprocket and Timing Chain
Crankshaft End Play
Piston Pin Installation
Piston Installation
Harmonic Balancer
Connecting Rod Bearings
Engine Front Cover
Coolant Inlet Adapter
Oil Dipstick Hole
Oil Pan
Cylinder Head Assembly
Adjustment of Valve Spring Loads
Cylinder Head Installation
Hydraulic Valve Lifters
Pushrods
Valve Train Loading
Intake Manifold
Rocker Covers
Water Inlet Adapter
Condenser
Coolant Outlet Adapter
Oil Filter Adapter
Oil Sample Valve
Ignition System
Throttle Body
Accessory Drive Units
Exhaust Manifolds, Water-Cooled
Engine Flywheel
Pressure Checking of Engine Coolant System
Lifting of Assembled Engines
Mounting the Engine on the Test Stand
External Cooling System Cleaning
Engine Coolant Jacket Cleaning (Flushing)
Coolant Charging
Test Oil Charging
Engine Oil Pump Priming
Calibration
Laboratory and Engine Test Stand Calibration
Testing of Reference Oils
Reference Oil Test Frequency
Reporting of Reference Oil Test Results
Evaluation of Reference Oil Test Results
Status of Non-Reference Oil Tests Relative to Reference
Oil Test
Status of Test Stands Used for Non-Standard Tests
Data Acquisition and Control
Sample Rate
Measurement Accuracy
Temperature
Pressure
Flow
Speed
Load
Measurement Resolution
System Time Response
Quality Index
Engine Operating Procedure
Dipstick and Hole Plug
Dipstick Hole O-ring
Engine Start-up and Shutdown Procedures
Start-up
Scheduled Shutdown
Non-Scheduled Shutdowns
Oil Sampling
Oil Leveling
Air-to-Fuel-Ratio Measurement and Control
Air-to-Fuel Ratio Verification
Blowby Flow Rate Measurement
NOx Determinations
Data Recording
Initial run (10 min)
Engine Oil Quality Testing (100 h)
Test Termination
Determination of Test Results
Engine Disassembly
Preparation of Parts for Rating of Sticking, Deposits,
and Plugging
Piston Deposit Rating
Post-Test Camshaft and Lifter Wear Measurements
Viscosity Test
Testing Oil Samples for Wear Metals
Blowby Flow Rate Measurements
Oil Consumption Computation
Photographs of Test Parts
Retention of Representative Test Parts
Severity Adjustments
Determination of Operational Validity
Report
Report Forms
Precision of Reported Units
Precision and Bias
Keywords
The Role of the ASTM Test Monitoring Center (TMC) and
the Calibration Program
Sequence IIIG Test Parts Replacement Guidelines
Sequence IIIG Determination Volume of Engine Oilin Pan
Sequence IIIG Test Fuel Analysis
Sequence IIIG Test Reporting
Sequence IIIG Test Air-to-Fuel Ratio Control Flow Chart
Sequence IIIG Test Set Points and Control States
Sequence IIIG Quality Index Upper and Lower Values
Sequence IIIG Engine Oil Level Worksheet
Blowby Flow Rate Determination
Safety Hazards
Sequence IIIG Blueprint Listing
Fluid Condition Module components
Engine Build Worksheets
Engine Oil Cooling System Schematic
Guidelines For Hardware Subject To First In – First Out Criteria
Sequence IIIGA Test Procedure
Sequence IIIGVIS Test Procedure
Sequence IIIGB Test Procedure