No. Under no circumstances should you lubricate the tool. Should you need to clean the tool, instructions for how to do so can be found in the instruction manual.
Friction is very important to the operation of the tool and you will notice a loss of power should lubrication make its way into the driver blade and flywheel especially. If these parts have been lubricated, you should take the tool into your local service agent to have the tool disassembled and the lubricant removed.