Drive shaft noise when engine work

Hello

My prius3 has been nearly 200,000 Km.

I have the problem about drive shaft. There are the noise of loosen when engine work with motor drive on my a little accelerator. But when drive only motor, no any noise.

Actually, my prius3 has the lubricate leak. 500cc per 10,000Km. Is it relate with power of engine? I try to search at my engine. no any lubricant leak point show.

My idea, this shaft noise came because not enough power when engine start to charge battery. But why long distance road, battery around 70%. There are this noise happen.

Please share your idea and your history maintenance. Thank you.

 

Is there another one had this problem?

But I have another problem about lubricant lower 1oz per 500mile without and drain point. But I saw at head gasket has the lubricant leak a bit.

Please suggest.

 

After I deeply consider for this noise. I found 1 of my wheel cover has been out of clip. After take it back. The noise was disappear. Thanks.