PSA: don't spray lithium grease in your shredder.

[Chakravartin]

Sam3 wrote:
Vegetable oil. Specifically Canola oil / soybean oil.

That's just Fellowes.

Everybody else uses mineral oil. Some of them add a bit of Naphthalene to the oil. (Don't add napthaline to your mineral oil.)

I'd avoid vegetable-based oils as they are prone to denaturing and gumming up the works.