Aftertreatment system friendly engine oil formulation
AssigneeChevron Oronite Company LLC
InventorsDavid S. LEE, Ramoun MOURHATCH, Michael MCLAUGHLIN, Patrick BOHAN, Taiki HATTORI
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Abstract
This disclosure describes a method of reducing catalyst poisoning in a diesel engine equipped with an aftertreatment system comprising a selective catalytic reduction device. The method includes lubricating the engine with a lubricating oil composition. The lubricating oil composition includes a major amount of oil of lubricating viscosity; and a detergent system comprising at least one magnesium-containing detergent or at least one magnesium-containing detergent and at least one calcium-containing detergent.
Claims20
A method of reducing catalyst poisoning in a diesel engine aftertreatment system comprising a selective catalytic reduction device, the method comprising:
- lubricating the engine with a lubricating oil composition comprising:
- a major amount of oil of lubricating viscosity;
- and
- a detergent system comprising at least one magnesium-containing detergent or at least one magnesium-containing detergent and at least one calcium-containing detergent.
A method of reducing catalyst poisoning in a diesel engine aftertreatment system comprising a selective catalytic reduction device, the method comprising:
- lubricating the engine with a lubricating oil composition comprising:
- a major amount of oil of lubricating viscosity;
- and
- a detergent system comprising Mg detergent or Mg detergent and at least one calcium-containing detergent, wherein the lubricating oil composition is devoid of Ca sulfonate.
Use of a lubricating oil composition to reduce catalyst poisoning in a diesel engine aftertreatment system comprising a selective catalytic reduction device, the lubricating oil composition comprising:
- a major amount of oil of lubricating viscosity;
- and
- a detergent system comprising at least one magnesium-containing detergent or at least one magnesium-containing detergent and at least one calcium-containing detergent.
Dependencies are inferred from the claim text.