A container pouring yellow oil into a machine in a workshop.

HYDRAULIC OIL

Oil being poured from a bottle into a black oil pan in a car engine.

ENGINE OIL

Close-up of a mechanical gear system with broken and leaking oil or lubricant.

GEAR OIL

Close-up of LEGO toy cars in blue, white, and black, with a splash of yellow liquid or paint in the background.

COMPRESSOR OIL

A mechanical engine with pistons and gears, with oil flowing through it, isolated on black background.

MOTOR OIL