Evaluation of automotive engine oils
in the sequence VIII spark-ignition engine
(CLR oil test engine) - Test method
(First revision)
engine oils (SAE grades 0W, 5W, 10W, 20, 30, 40, and 50, and
multi-viscosity grades) intended for use in spark-ignition
gasoline engines. The test procedure is conducted using a
carbureted, spark-ignition Cooperative Lubrication Research
(CLR) Oil Test Engine (also referred to as the Sequence VIII
test engine in this test method) run on unleaded fuel. An oil is
evaluated for its ability to protect the engine and the oil from
deterioration under high-temperature and severe service conditions.
The test method can also be used to evaluate the
viscosity stability of multi-viscosity-graded oils. Companion
test methods used to evaluate engine oil performance for
specification requirements are discussed in the latest revision
of Specification D4485.
1.2 Correlation of test results with those obtained in automotive
service has not been established. Furthermore, the
results obtained in this test are not necessarily indicative of
results that will be obtained in a full-scale automotive sparkignition
or compression-ignition engine, or in an engine
operated under conditions different from those of the test. The
test can be used to compare one oil with another.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
standard.
1.3.1 Exceptions—The values stated in inch-pounds for
certain tube measurements, screw thread specifications, and
sole source supply equipment are to be regarded as standard.
1.3.1.1 The bearing wear in the text is measured in grams
and described as weight loss, a non-SI term.
1.4 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. Specific precautionary
statements are provided throughout this test method.
