Use purpose-made shredder oil unless the shredder manual clearly allows another product. Shredder cutting heads need lubrication that reduces friction without leaving sticky residue or creating unsafe conditions. Cooking oils, WD-40, aerosol sprays, motor oil, and other substitutes can behave differently inside a shredder. They may gum up, smell, attract dust, or fail to protect the cutters properly. The safer buying decision is simple: if the machine requires oil, use shredder oil and follow the manual. That matters more for cross-cut and micro-cut shredders because they create more friction and paper dust than basic strip-cut machines. Avoid substitutes when maintaining office equipment used by several people.