Lubricating oil additive system particularly useful for natural gas fueled engines
AssigneeChevron Oronite Company LLC
InventorsJohn D. Palazzotto, Mark R. Logan
Life of this patent
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Abstract
A lubricating oil comprising a major amount of at least one of Group II, III, and IV base oil and a minor amount of 3,5-di-t-butyl 4-hydroxy phenol propionate. A method of making this lubricating oil and a method of lubricating a natural gas engine with this lubricating oil.
Claims26
Lubricating oil comprising a minor amount of one or more hindered phenols of the general formula:
- 4
- and a major amount of at least one of Group II, III and IV base oils.
Lubricating oil comprising a major amount of at least one of Group II, III and IV base oil and a minor amount of 3,5-di-t-butyl 4-hydroxy phenol propionate.
An additive formulation comprising 3,5-di-t-butyl 4-hydroxy phenol propionate;
- one or more dispersants;
- one or more wear inhibitors;
- and
- at least one of sulfonate, salycilate and phenate detergents.
Lubricating oil comprising:
- about 1 wt. % to about 8 wt. % of one or more dispersants;
- about 1 wt. % to about 8.5 wt. % of one or more detergents;
- about 0.2 wt. % to about 1.5 wt. % of one or more wear inhibitors;
- about 0.2 wt. % to about 3 wt. % 3,5-di-t-butyl 4-hydroxy phenol propionate;
- and
- about 6 wt. % to about 97 wt. % of at least one of Group II, III and IV base oil.
Lubricating oil comprising:
- about 1 wt. % to about 8 wt. % of one or more dispersants;
- about 1 wt. % to about 8.5 wt. % of one or more detergents;
- about 0.2 wt. % to about 1.5 wt. % of one or more wear inhibitors;
- about 0.6 wt. % to about 2.5 wt. % 3,5-di-t-butyl 4-hydroxy phenol propionate;
- and
- about 6 wt. % to about 97 wt. % of at least one of Group II, ill and IV base oil.
Dependencies are inferred from the claim text.