Normal grease works just as well as copper grease on wheel nuts/bolts and doesn't cost half as much. Alternatively rub them with a pencil.
The trouble with the torque setting is the extra lubrication of the grease reduces the friction so the torque is affected, but by how much I don't know.
The trouble with the torque setting is the extra lubrication of the grease reduces the friction so the torque is affected, but by how much I don't know.