Low viscosity oils
AssigneeStandard Oil Company (Indiana)
InventorsLuke A. Schaap, John H. Udelhofen, Samuel W. Harris
Life of this patent
Estimating the term…
Abstract
An improved low viscosity (i.e.) 5 W to 71/2 W engine oil resistant to oxidation and consumption comprising a major portion of a lubricating oil stock, a sulfurized oil, a dispersant, an anti-corrosion agent, an anti-rust agent, a detergent, an anti-oxidant, and a viscosity index improver.
Claims7
An internal combustion engine lubricating oil having a viscosity about 5W to 71/2W resistant to the consumption of the volatile, easily oxidized components which comprises a major portion of a suitable base oil and an amount of a sulfurized oil sufficient to reduce oil consumption, a dispersant, an anti-corrosion agent, an anti-rust agent, a detergent, an anti-oxidant, and a viscosity index improver.
A fully compounded internal combustion engine lubricating oil having a viscosity of about 5W to 71/2W resistant to the consumption of the volatile, easily oxidized components which comprises a suitable low viscosity base oil, and
- (a) about 0.1 to 5.0 parts by weight of a sulfurized oil;
- (b) about 1.0 to 10.0 parts by weight of a Mannich dispersant;
- (c) about 0.1 to 5.0 parts by weight of a zinc hydrocarbyldithiophosphate anti-corrosion agent;
- (d) about 0.1 to 5.0 parts by weight of an overbased magnesium sulfonate anti-rust detergent;
- (e) about 0.1 to 5.0 parts by weight of a neutral or overbased calcium sulfurized phenate anti-oxidant-detergent;
- (f) about 1.0 to 20.0 parts by weight of a viscosity index improver;
- each per 100 parts by weight of the fully compounded internal combustion engine lubricating oil.
A lubricating oil concentrate for dilution with base oil to form a lubricating oil having a viscosity of about 5W to 71/2W which comprises a suitable low viscosity base oil, and
- (a) about 5.0 to 10.0 parts by weight of a sulfurized oil;
- (b) about 10.0 to 50.0 parts by weight of a Mannich dispersant;
- (c) about 20.0 to 5.0 parts by weight of a metal dihydrocarbyl dithiophosphate anti-corrosion agent;
- (d) about 20.0 to 5.0 parts by weight of an overbased alkaline earth metal sulfonate anti-rust detergent;
- (e) about 20.0 to 5.0 parts by weight of a neutral or overbased alkaline earth metal sulfurized phenate anti-oxidant detergent;
- each per 100 parts by weight of the oil concentrate.
Dependencies are inferred from the claim text.