Lubricant with sulfur-containing polyalkylene glycol

A fluid comprising a base oil and an antioxidant, the base oil consisting of a sulfur-containing polyalkylene glycol selected from a group consisting of polyalkylene glycols having the following formula:

• where R1, R2, R3 and R4 are independently selected from a group consisting of —CH3 and —CH2CH3 groups;
• x is a number selected from a group consisting of 1 and 2;
• m, m′, n, and n′ are independently selected from integers in a range of zero to twenty such that the sum of m, m′, n and n′ is at least six and A is selected from a group consisting of —C2H4— and C6H4 groups, where greater than 80 weight-percent of the fluid is a sulfur-containing polyalkylene glycol and less than one weight-percent of the fluid is water, with weight percent based on total fluid weight and wherein the sulfur-containing polyalkylene glycol is free of oxygen bound directly to sulfur.