ASTM D8256-22a
- standard by ASTM International, 04/01/2022
- Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in the Sequence VH Spark-Ignition Engine Fueled wit
- Category: ASTM
$98.00
$49.00
Full Description
1.1''This 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.
1.2''The values stated in SI units are to be regarded as the 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, tubing size, or specified single source equipment.
1.3''A 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 |
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