Anyone know the torque settings for engine mounting bolts on the octi vrs?

and is it advisable to renew the bolts?

It depends on which bolts you are referring to, as different bolts are tightened to different torques.

In addition a number of the bolts - those fitting the mounts / brackets to the body or sub-frame - are stretch bolts and should be replaced once removed.

The Haynes manual contains a list of the torques etc. for the various bolts.