A method of providing a standby lubrication for an engine in the event of the failure of a main lubrication system of this engine, in which the failure is detected and, in response to the detection of this failure, at least one portion of a fuel fluid of the engine is tapped off to lubricate at least one element of the engine. A standby lubrication device includes a device for detecting a failure of a main lubrication system, a device for tapping off at least a portion of a fuel fluid of the engine in order to direct it to at least one element of the engine intended to be lubricated, and a controller connected to the tapping and detection devices, in order to carry out the standby lubrication method.