This standard specifies a method for evaluating the ability of automotive engine oils to inhibit camshaft cam wear. This standard is applicable to the evaluation of gasoline engine oil performance. The test engine is a Nis an KA24E spark plug ignition engine, and the valvetrain uses an overhead camshaft and a sliding rocker arm. This standard simulates the long-term idling operation conditions of automobile engines. The main test results are the camshaft wear amount (the camshaft has twelve cams, and each cam is measured at seven positions), followed by the cam apex wear amount and the wear metal iron content in the engine oil sample after the test. Other measurements such as fuel dilution, non-ferrous wear metal content and total oil consumption help assess the validity of the test results.
NB/SH/T 0897-2015 Referenced Document
ASTM D240 Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter
ASTM D3343 Standard Test Method for Estimation of Hydrogen Content of Aviation Fuels
ASTM D3525 Standard Test Method for Gasoline Diluent in Used Gasoline Engine Oils by Gas Chromatography
ASTM D4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
ASTM E191 Standard Specification for Apparatus For Microdetermination of Carbon and Hydrogen in Organic and Organo-Metallic Compounds
ASTM E230 Standard Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples
GB 1922-2006 Petroleum solvents for paints and cleaning
GB/T 11132 Test method for hydrocarbon types in liquid petroleum products—Fluorescent indicator adsorption*， 2022-10-12 Update
GB/T 11137 Black petroleum products--Determination of kinematic viscosity(reverse-flow method) and calculation of dynamic viscosity
GB/T 17040 Determination of sulfur in petroleum and petroleum products—Energy dispersive X-ray fluorescence spectrometry*， 2019-03-25 Update
GB/T 17476 Determination of Multiple Elements in Lubricating Oils and Base Oils by Inductively Coupled Plasma Emission Spectrometry*， 2023-05-23 Update
GB/T 265 Petroleum products--Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 503 Determination of the gasoline octane number—Test method for motor octane number*， 2016-06-14 Update
GB/T 5096 Test method for corrosiveness to copper from petroleum products by copper strip test*， 2017-07-31 Update
GB/T 5487 Determination of the gasoline octane number—Test method for research octane number*， 2015-12-31 Update
GB/T 6536 Standard test method for distillation of petroleum products at atmospheric perssure
GB/T 8017 Standard test method for vapor pressure of petroleum products.Reid method
GB/T 8018 Determination of Oxidation Stability of Gasoline by Induction Period Method*， 2016-06-01 Update
GB/T 8019 Determination of Gum Content in Fuels by Jet Evaporation
GB/T 8020 Determination of Lead Content in Gasoline by Atomic Absorption Spectrometry*， 2016-06-01 Update
SH/T 0656 Elemental analyzer method for determination of carbon, hydrogen and nitrogen in petroleum products and lubricants*， 2017-12-27 Update
SH/T 0663 Standard test method for determination of certain alcohols and ethers in gasoline by gas chromatography
NB/SH/T 0897-2015 history
2015NB/SH/T 0897-2015 Standard test method for evaluation of automotive engine oils in the sequence IVA spark-ignition engine