Oil-based composition

A method for producing an oily gel composition comprising

• mixing components (A), (B), and (C):
• (A) 4 to 60% by weight of a sphingosine of formula (1):
• wherein
• R1 represents a linear, branched, or cyclic, saturated or unsaturated hydrocarbon group having 4 to 30 carbon atoms which is optionally substituted by a hydroxyl group, a carbonyl group, or an amino group;
• Y represents a methylene group, a methine group, or an oxygen atom;
• each of X1, X2, and X3 independently represents a hydrogen atom, a hydroxyl group, or an acetoxy group, and X4 represents a hydrogen atom, an acetyl group, or a glyceryl group or forms an oxo group together with the adjacent oxygen atom, provided that, when Y represents a methine group, any one of X1 and X2 represents a hydrogen atom and the other is not present, and when X4 forms an oxo group, X3 is not present;
• each of R2 and R3 independently represents a hydrogen atom, a hydroxyl group, a hydroxymethyl group, or an acetoxymethyl group;
• each R independently represents a hydrogen atom or an amidino group or represent a linear or branched, saturated or unsaturated hydrocarbon group having a total of 1 to 8 carbon atoms which optionally have a substituent selected from the group consisting of a hydroxyl group, a hydroxyalkoxy group, an alkoxy group, and an acetoxy group;
• a represents a number of 2 or 3;
• and a bond represented by a broken line and a solid line indicates a saturated bond or an unsaturated bond;
• (B) 0.5 to 10% by weight of a water-soluble anionic polymer having a carboxyl group;
• and
• (C) 30 to 95.5% by weight of an oil in a liquid state at 25° C. selected from the group consisting of a hydrocarbon oil, an ester oil, and an ether oil
• to form a mixture;
• and
• heating the mixture to a temperature equal to or more than a melting point of the component (A) to neutralize the component (B) with the component (A) to form a salt, the heated mixture containing no more than 0.5%, including 0%, by weight of water,
• wherein component (C) is present in a continuous oil phase.