Yesterday I asked my brother to take out my car so I could hear it. Well, he did and stepped on it pretty well and as I see him pass by my house, I also see a cloud of white/bluish smoke coming out. My rear main seal is out and my h-pipe is covered in oil on the pass. side but why doesn't it do it all the time if that's the case. Also, the seal doesn't always leak oil, only after it's been stepped on for a few passes.(I know I need that fixed)