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Engine Wear Protection of SAE 5W-30 Oils
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English
Abstract
To evaluate the engine wear protection provided by SAE 5W-30 engine oils, two SAE 5W-30 engine oils containing different VI improvers and having different high-temperature high-shear-rate viscosities were tested in matched pairs of cars with 3.8 L V-6 and 2.3 L I-4 engines. The tests were run on Road-Simulation-Dynamometers using a cycle which simulated a combination of urban and highway driving for a distance of 82,000 km (51,000 miles).
In the 2.3 L I-4 engine, both oils gave excellent performance as measured by engine cleanliness, oil economy, used-oil properties and engine wear. In the 3.8 1 V-6 engine, both oils gave acceptable main and rod bearing wear protection. In other performance criteria, performance of both oils in the 3.8 L V-6 engine was excellent.
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Citation
Olson, D. and Pullen, G., "Engine Wear Protection of SAE 5W-30 Oils," SAE Technical Paper 852075, 1985, https://doi.org/10.4271/852075.Also In
References
- 1. McMillan M. L. Rosenberg R. C. Murphy C. K. “Viscosity Effects on Engine Wear Under High-Temperature, High-Speed Conditions” SAE Paper 780982
- 2. The Relationship Between High-Temperature Oil Rheology and Engine Operation - A Status Report 1985
- 3. Carlson D. C. “The Effect of VI Improvers and Resultant Base Oil Volatility on Automotive Oil Economy With SAE 5W-40 Oil” SAE Paper 830029
- 4. Johnson R. H. Wright W. A. “Rheology of a Multigrade Motor Oil” SAE 680072
- 5. Stambaugh R. L. Kopko R. J. “A Test Procedure For Evaluating Temporary-Shear Loss of Engine Lubricants” SAE 750379
- 6. Lane G. Roberts D. C. Times J. M. “Measurement of the Viscosity of Multigrade Oils in a Running Engine” SAE Paper 770379
- 7. Stambaugh R. L. Kopko R. J. “Behavior of Non-Newtonian Lubricants in High Shear Rate Applications” SAE Paper 730487