ASTM D5967 Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine
4. Summary of Test Method
4.1 The test operation involves use of a Mack E7-350 diesel engine with a warm-up, a 2-h flush for each test, and then a constant speed and load conditions that are held for the remainder of the test. Reference oil test length is 300 h. Non-reference oil test length is 250 h.
4.2 Oil samples are taken periodically and analyzed for viscosity increase.
4.3 Engine rebuild frequency is based on the degradation of test parameters and is left to the discretion of the test laboratory. At rebuild, the power section of the engine is disassembled, solvent-cleaned, measured, and rebuilt, using all new pistons, rings, cylinder liners, and valve guides, in strict accordance with furnished specifications.
4.4 The engine crankcase is solvent-cleaned, and worn or defective parts are replaced.
4.5 The test stand is equipped with appropriate accessories for controlling speed, load, and various engine operating conditions.
5. Significance and Use
5.1 This test method was developed to evaluate the viscometric performance of engine oils in turbocharged and inter-cooled four-cycle diesel engines. Results are obtained from used oil analysis.
5.2 The test method is used for engine oil specification acceptance when all details of the procedure are followed.
