When can you apply a potion / oil to another creature?

[harmor]

Could I, for example, apply Silversheen to an ally while he's not in combat?

What about a Potion of Cure Light Wounds?

Please advise.

[Zurai]

Core Rulebook, page 478 wrote:

A character can carefully administer a potion to an unconscious creature as a full-round action, trickling the liquid down the creature’s throat. Likewise, it takes a full-round action to apply an oil to an unconscious creature.