Automatic transmission fluids and additives therefor

Details Automatic transmission fluids and additives therefor Automatic transmission fluids and additives therefor

1993-07-19

1995-02-07

Johnson, Jerry D.

Compositions

Electrolytes for electrical devices

252 515A, C10M11104, C10M11102

Patent

active

053873467

ABSTRACT:
A lubricant composition especially adapted for use as an automatic transmission fluid, which composition consists essentially of: a) from 50 to 85 weight percent of a mineral oil having a viscosity at 100.degree. C. in the range of 3 to 5 centistokes; b) from 5 to 35 weight percent of a poly-.alpha.-olefin lubricating oil having a viscosity at 100.degree. C. in the range of 1 to 8 centistokes; and c) from 8 to 15 weight percent of a combination of alkenyl succinimide dispersant, viscosity index improver and antioxidant; said composition being further characterized in that it contains less than 7.0 weight percent of viscosity index improver and in that the composition has a Brookfield viscosity at -40.degree. C. of no more than 20,000 cP.

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