Lubricating oil composition and production method therefor

2:

• The lubricating oil composition according to claim 1, wherein the content of the imide compound as expressed in terms of a nitrogen atom is 100 to 1,000 ppm by mass on the basis of the total amount of the lubricating oil composition.

3:

• The lubricating oil composition according to claim 1, wherein a total content of a succinic acid monoimide of formula (i) and a succinic acid bisimide of formula (ii) is less than 10 parts by mass based on 100 parts by mass of a total amount of the imide compound:

4:

• The lubricating oil composition according to claim 1, wherein the content of the metal-based detergent as expressed in terms of a metal atom is 100 to 5,000 ppm by mass on the basis of the total amount of the lubricating oil composition.

5:

• The lubricating oil composition according to claim 1, wherein a content ratio [N/M] of a nitrogen atom (N) derived from the imide compound to a metal atom (M) derived from the metal-based detergent is 0.05 to 2.00 in terms of a mass ratio.

6:

• The lubricating oil composition according to claim 1, wherein the metal-based detergent is at least one selected from the group consisting of a calcium sulfonate having a branched alkyl group and a calcium phenate having a branched alkyl group.

7:

• The lubricating oil composition according to claim 1, wherein a content of a metal-based detergent having a linear alkyl group is less than 10 parts by mass based on 100 parts by mass of a total amount of the metal-based detergent.

8:

• The lubricating oil composition according to claim 1, wherein a content of a molybdenum atom is less than 50 ppm by mass on the basis of the total amount of the lubricating oil composition.

9:

• The lubricating oil composition according to claim 1, which is suitable for internal combustion engines for motorcycle.