Lubricant composition, method for producing lubricant composition, and continuously variable transmission

A method for producing a lubricating oil composition, comprising:

• blending a naphthene-based synthetic oil (a) having a flash point of 140° C. or higher and an ester (b) having 5 to 32 carbon atoms and having a branched chain, in such a manner that the content of the naphthene-based synthetic oil (a) based on the total amount of the composition is 35% by mass or more and less than 75% by mass;
• wherein the naphthene-based synthetic oil (a) is a synthetic oil of formula (1):
• Rp1111—X11—R12—X12—Rp1213 (1)
• wherein R11 and R13 each independently represent a monovalent hydrocarbon group, R12 represents a divalent hydrocarbon group, X11 and X12 each independently represent a cyclohexane ring, a bicycloheptane ring, or a bicyclooctane ring, and p11 and p12 each independently represent an integer of 1 or more and 6 or less.