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Significant Considerations in Selecting Base Stocks for Automatic Transmission Fluids
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Abstract
The results of numerous laboratory bench tests and over-the-road field tests conducted on fluids blended with base stocks of varying physical properties are compared.
The effects of using oils derived from solvent-refining versus those manufactured from a hydrotreating process are examined.
Other areas investigated include comparisons of high vs. low VI; light vs. medium grade neutrals; and additive response to these differing base s tocks.
Although high viscosity index (HVI), hydro treated, medium grade neutrals generally gave superior results in the tests performed, it was determined ATF's blended with light grade hydrotreated neutrals of low viscosity index (LVI) also showed promising results when evaluated against standard industry tests.
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Citation
Bagnall, R. and Swinney, B., "Significant Considerations in Selecting Base Stocks for Automatic Transmission Fluids," SAE Technical Paper 821242, 1982, https://doi.org/10.4271/821242.Also In
References
- Asseff, P.A. “Some Performance Characteristics of Hydrorefined Lubricating Oils” A.P.J. Proceedings, Mid-Year Meeting 1970 Volume 50
- Bryer, Reif, Steinmets Thomas, “Sun Oil Company's New Lube Refining” National Fuels and Lubricants Meeting New York September 14th 1972
- Chertkov, Ya. B. “Change In Phase Composition of Middle Distillate Fuels Upon Heating” 1437 1439 June 1974
- Murray, MacDonald, White, Wright, “The Effect of Base Stock Composition or Lubricant Oxidation Performance” Petroleum Review February 1982
- Willermet, P.A. Mahoney, L.R. Kandah, S.K. “The Application of Antioxidant Analysis to Transmission Fluid Testing” SAE Paper 790016