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ASTM D 8256 : 2020

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in the Sequence VH Spark-Ignition Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions

Available format(s)

Hardcopy , PDF

Superseded date

07-04-2021

Superseded by

ASTM D 8256 : 2021

Language(s)

English

Published date

02-06-2020

€122.04
Excluding VAT

Committee
D 02
DocumentType
Test Method
Pages
90
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This test method is commonly referred to as the Sequence VH test, and it has been correlated with the Sequence VG test. The Sequence VG test was previously correlated with vehicles used in stop-and-go service prior to 1996, particularly with regard to sludge and varnish formation.3 It is one of the test methods required to evaluate oils intended to satisfy the API SN, SN Plus performance category.

1.2The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

1.2.1Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or specified single source equipment.

1.3A table of contents follows:

Section

Scope

1

Referenced Documents

2

Terminology

3

Summary of Test Method

4

Significance and Use

5

Apparatus (General Description)

6

Apparatus (The Test Engine)

7

Sequence VH Test Engine

7.1

Required New Engine Parts

7.2

Reusable Engine Parts

7.3

Specially Fabricated Engine Parts

7.4

Special Engine Measurement and Assembly Equipment

7.5

Miscellaneous Engine Components—Preparation

7.6

Solvents and Cleaners Required

7.7

Assembling the Test Engine—Preparations

7.8

Assembling the Test Engine—Installations

7.9

Engine Installation on the Test Stand

7.10

Engine Fluids (Supply/Discharge Systems)

8

Intake Air

8.1

Fuel and Fuel System

8.2

Engine Oil and Engine Oil System

8.3

Coolants

8.4

Measurement Instrumentation

9

Temperatures

9.1

Pressures

9.2

Flow Rates

9.3

Fuel Consumption

9.4

Speed and Torque

9.5

Exhaust Gas

9.6

Humidity

9.7

Miscellaneous Laboratory Equipment

10

Test Stand Calibration

11

Test Procedure

12

Pre-Test Procedure

12.1

Engine Operating Procedure

12.2

Periodic Measurements and Functions

12.3

Special Maintenance Procedures

12.4

Diagnostic Data Review

12.5

End of Test Procedure

12.6

Interpretation of Test Results

13

Parts Rating Area—Environment

13.1

Sludge Ratings

13.2

Varnish Ratings

13.3

Clogging

13.4

Sticking

13.5

Used Oil Analyses

13.6

Assessment of Test Validity

14

General

14.1

Used Oil Analyses—Interpretation

14.2

Blowby Flow Rate

14.3

Manifold Absolute Pressure (MAP)

14.4

Fuel Consumption Rate

14.5

Oil Consumption

14.6

Engine Parts Replacement

14.7

Quality Index

14.8

Final Test Report

15

Report Forms

15.1

Precision and Bias

16

Keywords

17

ANNEXES

ASTM TMC: Organization

Annex A1

ASTM TMC: Calibration Procedures

Annex A2

ASTM TMC: Maintenance Activities

Annex A3

ASTM TMC: Related Information

Annex A4

Safety Precautions

Annex A5

Control and Data Acquisition Requirements

Annex A6

Detailed Specifications and Photographs of Apparatus

Annex A7

Test Engine Part Number, Classification, and Usage Guidelines

Annex A8

External Oil Heat Exchanger Cleaning Technique

Annex A9

Sequence VH Report Forms and Data Dictionary

Annex A10

Dipstick Calibration

Annex A11

Critical Part Supplier List

Annex A12

Operational Data Log—Engine Oil

Annex A13

Rating Worksheets

Annex A14

Fuel Injector Flow Measurements

Annex A15

APPENDIXES

Piston and Ring Measurements Record Forms

Appendix X1

Sources of Materials and Information

Appendix X2

1.4This 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. Specific hazard statements are given in 7.7, 7.7.1, 7.7.2, 7.7.3, 7.7.4, 7.7.5, A5.3.4, and A5.3.5.5.

1.5This 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.

ASTM D 4485 : 2020 Standard Specification for Performance of Active API Service Category Engine Oils

ASTM D 6304 : 2004 : REV A : EDT 1 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fisher Titration
ASTM D 4175 : 2001 : EDT 1 Standard Terminology Relating to Petroleum, Petroleum Products, and Lubricants
ASTM D 4175 : 2002 Standard Terminology Relating to Petroleum, Petroleum Products, and Lubricants
ASTM D 445 : 1988 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
ASTM D 4294 : 2008 Standard Test Method for Sulfur in Petroleum and Petroleum Products by Energy Dispersive X-ray Fluorescence Spectrometry
ASTM D 2789 : 1995 Standard Test Method for Hydrocarbon Types in Low Olefinic Gasoline by Mass Spectrometry
ASTM D 4052 : 1996 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
ASTM D 445 : 2001 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
ASTM D 3525 : 1993 : R1997 Standard Test Method for Gasoline Diluent in Used Gasoline Engine Oils by Gas Chromatography
ASTM D 3237 : 1997 Standard Test Method for Lead In Gasoline By Atomic Absorption Spectroscopy

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