I have a 05 Nissan Maxima SL with about 87500 miles on it and everytime i floor or step on it hard i hear a noise under the hood? Almost like a disc is rubbing or something rattling? I have no clue what the noise is and I need help!

 

My maxima makes a rattling noise by the enging everytime i'm low on oil. I've seen other threads from members that say the same. As soon as I do the oil change the rattle goes away.