Burning smell at higher rpm

[rc_bdo]

In my 04 ls hatchback with 64k, when I am either passing someone or going up a hill at over 3500 rpm, I get a horrific smell. It smells sort of like burning oil or metal or rubber or something. I have had this problem since I got the car in October. When I first got it, the oil was kinda high. So I figured it was just that. But I have since changed my oil and it is still stinking. I just have no idea what the smell is coming from since nothing looks to be burned under the hood. Is this something I need to be worrying about? What is making the stench?

I owned a 2012 Sonic Aveo, and have the same problem. I went to the GM and they couldnt figure out the problem. They thought it was the air conditioning system. But I found out the problem. It was a design flaw on the power steering lubrication mechanism. Aveo is using electronic power steering system, it uses power steering oil instead of power steering fluid for hydraulics. There is a leakage on the power steering cable, i replace it twice, the leaking still happend. And it drenched the fan belt underneath it, So when you go high RPM it was actually burning the oil on the belt. Hence the smell, and it goes in from the air conditioning system.