Hydrocarbon-Based Lubricants with Polyether

(canceled)

A lubricant composition comprising a hydrocarbon oil and from about 2 wt % to about 20 wt % of a polyalkylene oxide homopolymer that has a formula

• R—ORtOnR2
• wherein R and R2 are independently selected from hydrocarbyl groups having one to about four carbon atoms and hydrogen, with the caveat that at least one of R and R2 is a hydrocarbyl group, R1 is an aliphatic hydrocarbylene group having 3 or 4 carbon atoms, and n is an integer from 4 to about 50, wherein the lubricant composition is an oil.

5-7. (canceled)

A method of treating a hydrocarbon oil, comprising adding to the oil a polyalkylene oxide homopolymer with monomer units having 3 to 4 carbon atoms in an amount such that the lubricant comprises from about 2 wt % to about 20 wt % of the polyalkylene oxide homopolymer.

A lubricant treatment composition consisting of

• (a) a polyalkylene oxide homopolymer with monomer units having 3 to 4 carbon atoms and
• (b) at least one lubricant additive other than detergents, surfactants, and dispersants.

A method of reducing varnish formation in a system lubricated with a hydrocarbon lubricant, comprising including in the hydrocarbon lubricant a polyalkylene oxide homopolymer with monomer units having 3 to 4 carbon atoms, wherein the polyalkylene oxide homopolymer is free of surfactant character in the lubricant, wherein the lubricant is a turbine oil.