Engineered synthetic engine oil and method of use
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United States of America Patent
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-
Jul 1, 2003
Grant Date -
N/A
app pub date -
Jul 18, 2002
filing date -
Jul 18, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A synthetic lubricant for gasoline and diesel engines having a viscosity ranging between about 14.5 and 16.5 cs at 100.degree. C., the lubricant containing from about 55 to about 75 volume percent polyalphaolefin having a viscosity of about 6 to 8 cs at 100.degree. C., an ethylene-propylene copolymer, an ester or diester, a packaged additive, a total base number enhancer and a minor effective amount of an antifoamant. A method of use is also provided whereby the subject lubricant is recirculated through an operating engine while periodically monitoring the total base number and adjusting the total base number to a level of about 12.0 by the addition of a total base number enhancer such as calcium phenate.
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