Chevron U.s.a. Inc.

Chevron Limited

Nancy K Smrcka

John Michael Rosenbaum

A lubricating oil comprising: a) at least 5 wt % of lubricating base oil, made from a waxy feed, having &#x3e;10 wt % molecules with cycloparaffinic functionality, a ratio of molecules with monocycloparaffinic functionality to molecules with multicycloparaffinic functionality &#x3e;20, and b) a DI additive package; wherein the lubricating oil contains &#x3c;0.2 wt % VI improver and wherein the lubricating oil has a low sulfated ash and a low CCS viscosity at &#x2212;20&#xb0; C. A lubricating oil with a kinematic viscosity at 100&#xb0; C. between 12.5 and 16.3 cSt with a low CCS viscosity comprising: a) a lubricating base oil, made with a waxy feed, having a viscosity index &#x3e;150, b) up to 75 wt % unconventional petroleum derived bright stock, c) a lower ash DI additive package, and d) &#x3c;0.2 wt % viscosity index improver. A process to make lubricating oil with a low sulfated ash and low CCS viscosity.

Lower ash lubricating oil with low cold cranking simulator viscosity

A method for operating a railroad engine, comprising: using a lubricating oil in the railroad engine, wherein the lurbricating oil has: a) less than 100 ppm zinc; b) a cold cranking simulator viscosity at &#x2212;15&#xb0; C. less than 7000 cP; c) a GE HTHS (final) of at least 10.8 cP; and d) a TBN between 8 and 20.

Method for using medium-speed diesel engine oil

A process to make a lubricating oil, comprising: a) selecting a lubricating base oil, made from a waxy feed, having: i. less than 0.3 wt % aromatics, ii. greater than 10 wt % molecules having cycloparaffinic functionality, iii. a ratio of molecules with monocycloparaffinic functionality to molecules with multicycloparaffinic functionality greater than 15; and b) blending the lubricating base oil with an engine oil additive package formulated to protect silver bearings and less than 2.0 wt % viscosity index improver; wherein the lubricating oil has a cold cranking simulator viscosity at &#x2212;15&#xb0; C. less than 7000 cP, a GE HTHS (final) of at least 10.8 cP, and a TBN between 8 and 20.

Process for making medium-speed diesel engine oil

A lubricating oil having a CCS viscosity at &#x2212;15&#xb0; C. less than 7000 cP, good shear stability, and a TBN between 8 and 20 comprising: a) a lubricating base oil made from a waxy feed, b) an engine oil additive package formulated to protect silver bearings, and c) less than 2.0 wt % viscosity index improver. Also a process to make a lubricating oil having a CCS viscosity at &#x2212;15&#xb0; C. less than 7000 cP, good shear stability, and a TBN between 8 and 20. Additionally, a lubricating oil having low CCS viscosity comprising specified amounts of lubricating base oil made from a waxy feed, engine oil additive package formulated to protect silver bearings, up to 55 wt % bright stock with a VI greater than 120, and no viscosity index improver or conventional pour point depressant additives. Also, a method for operating a railroad engine using the lubricating oil of this invention.

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Richmond, CA, United States of America

Nancy K Smrcka