Significance and Use
5.1 Test Method—The data obtained from the use of this test method provide a comparative index of the fuel-saving capabilities of automotive engine oils under repeatable laboratory conditions. A BL has been established for this test to provide a standard against which all other oils can be compared. The BL oil is an SAE 20W-30 grade fully formulated lubricant. The test procedure was not designed to give a precise estimate of the difference between two test oils without adequate replication. The test method was developed to compare the test oil to the BL oil. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.
5.2 Use—The Sequence VID test method is useful for engine oil fuel economy specification acceptance. It is used in specifications and classifications of engine lubricating oils, such as the following:
5.2.1 Specification D4485.
Scope
1.1 This test method covers an engine test procedure for the measurement of the effects of automotive engine oils on the fuel economy of passenger cars and light-duty trucks with gross vehicle weight 3856 kg or less. The tests are conducted using a specified spark-ignition engine with a displacement of 3.6 L (General Motors)4 on a dynamometer test stand. It applies to multi viscosity grade oils used in these applications.
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.
1.4 This test method is arranged as follows:
| Subject | Section |
| Introduction |
|
| Scope | |
| Referenced Documents | |
| Terminology | |
| Summary of Test Method | |
| Significance and Use | |
| Apparatus | |
| General | |
| Test Engine Configuration | |
| Laboratory Ambient Conditions | |
| Engine Speed and Torque Control | |
| Dynamometer | |
| Dynamometer Torque | |
| Engine Cooling System | |
| External Oil System | |
| Fuel System | |
| Fuel Flow Measurement | |
| Fuel Temperature and Pressure Control to the Fuel | |
| Fuel Temperature and Pressure Control to Engine Fuel Rail | |
| Fuel Supply Pumps | |
| Fuel Filtering | |
| Engine Intake Air Supply | |
| Intake Air Humidity | |
| Intake Air Filtration | |
| Intake Air Pressure Relief | |
| Temperature Measurement | |
| Thermocouple Location | |
| AFR Determination | |
| Exhaust and Exhaust Back Pressure Systems | |
| Exhaust Manifolds | |
| Laboratory Exhaust System | |
| Exhaust Back Pressure | |
| Pressure Measurement and Pressure Sensor Locations | |
| Engine Oil | |
| Fuel to Fuel Flowmeter | |
| Fuel to Engine Fuel Rail | |
| Exhaust Back Pressure | |
| Intake Air | |
| Intake Manifold Vacuum/Absolute Pressure | |
| Coolant Flow Differential Pressure | |
| Crankcase Pressure | |
| Engine Hardware and Related Apparatus | |
| Test Engine Configuration | |
| ECU (Power Control Module) | |
| Thermostat Block-Off Adapter Plate | |
| Wiring Harness | |
| Oil Pan | |
| Engine Water Pump Adapter Plate | |
| Thermostat Block-Off Plate | |
| Oil Filter Adapter Plate | |
| Modified Throttle Body Assembly | |
| Fuel Rail | |
| Miscellaneous Apparatus Related to Engine Operation | |
| Reagents and Materials | |
| Engine Oil | |
| Test Fuel | |
| Engine Coolant | |
| Cleaning Materials | |
| Preparation of Apparatus | |
| Test Stand Preparation | |
| Engine Preparation | |
| Cleaning of Engine Parts | |
| Engine Assembly Procedure | |
| General Assembly Instructions | |
| Bolt Torque Specifications | |
| Sealing Compounds | |
| Harmonic Balancer | |
| Thermostat | |
| Coolant Inlet | |
| Oil Filter Adapter | |
| Dipstick Tube | |
| Sensors, Switches, Valves, and Positioner’s | |
| Ignition System | |
| Fuel Injection System | |
| Intake Air System | |
| Engine Management System | |
| Accessory Drive Units | |
| Exhaust Manifolds | |
| Engine Flywheel and Guards | |
| Lifting of Assembled Engines | |
| Engine Mounts | |
| Non-Phased Camshaft Gears | |
| Internal Coolant Orifice | |
| Calibration | |
| Stand/Engine Calibration | |
| Procedure | |
| Reporting of Reference Results | |
| Analysis of Reference/Calibration Oils | |
| Instrument Calibration | |
| Engine Torque Measurement System | |
| Fuel Flow Measurement System | |
| Coolant Flow Measurement System | |
| Thermocouple and Temperature Measurement System | |
| Humidity Measurement System | |
| Other Instrumentation | |
| Test Procedure | |
| External Oil System | |
| Flush Effectiveness Demonstration | |
| Preparation for Oil Charge | |
| Initial Engine Start-Up | |
| New Engine Break-In | |
| Oil Charge for Break-In | |
| Break-In Operating Conditions | |
| Standard Requirements for Break-In | |
| Routine Test Operation | |
| Start-Up and Shutdown Procedures | |
| Flying Flush Oil Exchange Procedures | |
| Test Operating Stages | |
| Stabilization to Stage Conditions | |
| Stabilized BSFC Measurement Cycle | |
| BLB1 Oil Flush Procedure for BL Oil Before Test Run 1 | |
| BSFC Measurement of BLB1 Oil Before Test Oil | |
| BLB2 Oil Flush Procedure for BL Oil Before Test Oil Run 2 | |
| BSFC Measurement of BLB2 Oil Before Test Oil | |
| Percent Delta Calculation for BLB1 vs. BLB2 | |
| Test Oil Flush Procedure | |
| Test Oil Aging, Phase I | |
| BSFC Measurement of Aged (Phase I) Test Oil | |
| Test Oil Aging, Phase II | |
| BSFC Measurement of Aged (Phase II) Test Oil | |
| Oil Consumption and Sampling | |
| Flush Procedure for BL Oil (BLA) After Test Oil | |
| General Test Data Logging Forms | |
| Diagnostic Review Procedures | |
| Determination of Test Results | |
| Final Test Report | |
| Precision and Bias | |
| Keywords | |
| Annexes |
|
| The Role of the ASTM Test Monitoring Center and the | |
| Detailed Specifications and Drawings of Apparatus | |
| Oil Heater Cerrobase Refill Procedure | |
| Engine Part Number Listing | |
| Safety Precautions | |
| Report Format | |
| Statistical Equations for Mean and Standard Deviations | |
| Oil Sump Full Level Determination Consumption | |
| Fuel Injector Evaluation | |
| Pre-test Maintenance Checklist | |
| Blow-by Ventilation System Requirements | |
| Calculation of Test Results | |
| Calculation of Unweighted Baseline Shift | |
| Non–Phased Cam Gear and Position Actuator Installation Procedure | |
|
|
|
| Appendix |
|
| Procurement of Test Materials |
