Lots of threads on this and in short it's normal for these cars and it's a Vapor smell and not an oil leak. Some have had the rear main seal replaced and it can help but for the most part it decreaes over time.
Mine does it but less now than when I first purchasd it and that was just 4 weeks ago. Not a huge deal to me as long as I know there is no oil leak. And, when you mash the throttle I'm too busy hanging on to notice it any longer
