1.1本试验方法涵盖了一种发动机试验程序，用于测量汽车发动机油对车辆总重不超过3856 kg的乘用车和轻型卡车燃油经济性的影响。在测功机试验台上，使用排量为3.6升的指定火花点火发动机（通用汽车）进行试验。它适用于这些应用中使用的多粘度等级油。 1.2以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.2.1 例外情况 — 没有直接等效物，如螺纹单位、国家管道螺纹/直径、管道尺寸和单源供应设备规范。 此外，制动油耗（BSFC）的测量单位为千克/千瓦时。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 试验方法 — 使用本试验方法获得的数据提供了可重复实验室条件下汽车发动机油节油能力的比较指数。已为该测试建立了BL，以提供一个可与所有其他油进行比较的标准。 BL油是一种SAE 20W-30级全配方润滑剂。在没有充分复制的情况下，测试程序的设计不是为了精确估计两种测试油之间的差异。开发了测试方法，以比较测试油和BL油。最新版本的规范中讨论了用于根据规范要求评估发动机机油性能的配套测试方法 D4485 . 使用 — 顺序VID测试方法有助于发动机机油燃油经济性规范的验收。它用于发动机润滑油的规格和分类，例如: 规格 D4485 . API 1509。 SAE J304级。 SAE分类J1423。

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) 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. 1.2.1 Exceptions — Where there is no direct equivalent such as the units for screw threads, National Pipe threads/diameters, tubing size, and single source supply equipment specifications. Additionally, Brake Fuel Consumption (BSFC) is measured in kilograms per kilowatthour. 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. ====== Significance And Use ====== 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 . 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: Specification D4485 . API 1509. SAE Classification J304. SAE Classification J1423.