| 摘要 |
Provided are compositions for use in Automatic Transmission Fluids, and more specifically to Automatic Transmission Fluids made using Gas-to-Liquids lubricant base oils, formulated with minimal to no polymeric Viscosity Index improvers. The automatic transmission fluids disclosed herein contain a) a lubricant base oil having a Viscosity Index greater than a Viscosity Index Factor as calculated by the following equation: <?in-line-formulae description="In-line Formulae" end="lead"?>Viscosity Index Factor=28xln(Kinematic Viscosity at 100° C.)+90;<?in-line-formulae description="In-line Formulae" end="tail"?> b) an automatic transmission fluid additive package; and c) less than 1.0 wt % Viscosity Index improver. The automatic transmission fluid has a kinematic viscosity at -7° C. of less than 300 mm<SUP>2</SUP>/s, and a kinematic viscosity at 100° C. between 5.0 and 6.0 mm<SUP>2</SUP>/s.
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