Casting mould and piston produced with the casting mould

A piston cast in a casting mold comprising:

• a piston part having an internal surface, and a surface texture disposed on the internal surface defined by a plurality of grooves, wherein the plurality of grooves have the following dimensions,
• a depth of 0.2 mm<t<0.5 mm,
• a width of 0.02 mm<b<0.05 mm, and
• at least two groove walls which are inclined outward at 0°<α<10°.

A casting mold for casting a piston, comprising:

• a mold body having a surface texture in a region corresponding to an internal surface of a piston skirt;
• wherein the surface texture as a quadrilateral pattern and is defined by a plurality of grooves, and wherein the plurality of grooves have the following configuration:
• a depth of 0.2 mm<t<0.5 mm;
• a width of 0.02 mm<b<0.05 mm;
• and
• at least two groove walls inclined outwardly from one another at 0°<α<10°;
• and
• wherein at least two grooves of the plurality of grooves have a distance of approximately 0.2 mm<a<2.0 mm between one another.