Originally Posted by HomieG35

You are missing something. I don't believe there is anyway that even a full exhaust system could cause the engine to start eating oil.

The best way to prove it is to say,

-No oil consumption
-Installed test pipes
-Had oil consumption
-Removed test pipes
-No oil consumption
-Install test pipes again
-See if you have oil consumption

Only way I'm gonna buy it. And then we have some serious investigating to do as to way it's happening... but I think something else is going on.

It may be that your car has an issue. With test pipes and exhaust you liked the sound, took it to redline more often, and the problem made itself known. You took off the test pipes, were scared about consuming oil and never floored the car anymore, and the consumption issue is subdued, until the next time you start redline it again.