SAE 15W-30 LUBRICATING OIL COMPOSITION HAVING IMPROVED OXIDATIVE STABILITY
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United States of America Patent
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Issued Date -
Feb 4, 2016
app pub date -
Jul 31, 2014
filing date -
Jul 31, 2014
priority date (Note) -
Abandoned
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Abstract
We provide a SAE 15W-30 lubricating oil, comprising: a Group II base oil having a KV at 100° C. from 5.0 to 8.0 mm2/s; a second Group II base oil having a KV at 100° C. from 10 to 14 mm2/s; a DI additive package designed to meet API CJ-4; and 0.50 to 4.95 wt % viscosity modifier; wherein the lubricating oil has a TBN from 8.55 to 11.00 and provides an Induction Time in a CMOT from 270 to 450 minutes. We also provide a process for making the lubricating oil, comprising: blending the Group II base oils to make a blended base oil mixture and adding to the blended base oil mixture: a DI additive package designed to meet API CJ-4, and a viscosity modifier; wherein the lubricating oil has a TBN from 8.55 to 11.00 and provides an Induction Time in a CMOT from 270 to 450 minutes.
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