Lubricating composition with enhanced filterability
AssigneeExxonMobil Research and Engineering Company
InventorsMichael L. BLUMENFELD, Douglas E. DECKMAN, Smruti A. DANCE, Charles L. BAKER, JR., James David BURRINGTON, Ewan E DELBRIDGE
Life of this patent
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Abstract
A lubricating oil composition that includes a highly paraffinic base oil, a controlled release friction modifier (CRFM) and an effective amount of detergent. The CRFM includes an ionic tetrahedral borate compound comprising a cation and a tetrahedral borate anion which includes a boron atom, the boron atom having two bidentate di-oxo ligands of C18 tartrimide. The CRFM is a high stabilizer CRFM. The detergent includes a mixed magnesium and calcium detergent system having a calcium to magnesium ratio of less than 2:1.
Claims16
A lubricating oil composition, comprising:
- a base oil comprising a highly paraffinic base oil;
- a controlled release friction modifier (CRFM), including:
- a tetrahedral borate anion having a boron atom with two bidentate di-oxo ligands both being a linear C18-tartrimide,
- a first dispersant comprising a conventional ammonium substituted polyisobutenyl succinimide compound having a polyisobutenyl number average molecular weight of 750 to 2,500, and
- a second dispersant comprising an ammonium substituted polyisobutenyl succinimde compound having an N:CO ratio of 1.8 and a polyisobutylenyl number average molecular weight of 750 to 2,500;
- and
- an effective amount of a detergent.
A lubricating oil composition, comprising:
- a base oil comprising a highly paraffinic base oil;
- a high stabilizer controlled release friction modifier (CRFM), including:
- a tetrahedral borate anion having a boron atom with two bidentate di-oxo ligands both being a linear C18-tartrimide,
- a first dispersant comprising a conventional ammonium substituted polyisobutenyl succinimide compound having a polyisobutenyl number average molecular weight of 750 to 2,500, and
- a second dispersant comprising an ammonium substituted polyisobutenyl succinimde compound having an N:CO ratio of 1.8 and a polyisobutylenyl number average molecular weight of 750 to 2,500;
- and
- an effective amount of a mixed magnesium and calcium detergent system.
A lubricating oil composition, comprising:
- a highly paraffinic base oil;
- a controlled release friction modifier (CRFM), including:
- a tetrahedral borate anion having a boron atom with two bidentate di-oxo ligands both being a linear C18-tartrimide,
- a first dispersant comprising a conventional ammonium substituted polyisobutenyl succinimide compound having a polyisobutenyl number average molecular weight of 750 to 2,500, and
- a second dispersant comprising an ammonium substituted polyisobutenyl succinimde compound having an N:CO ratio of 1.8 and a polyisobutylenyl number average molecular weight of 750 to 2,500;
- and
- an effective amount of a mixed magnesium and calcium detergent system having a calcium:magnesium ratio of less than 2:1.
Dependencies are inferred from the claim text.