What's the damage from doing this?

[BrianMSmith]

I was topping up my oil with Redline, and noticed that along with the oil, the little round paper/foam insert in the bottle cap went into the engine. I'm not sure if it's made out of paper or styrofoam since it was my last bottle. I am fine to ignore it and assume it either melts or gets shredded by the valvetrain...or maybe it just sits in the sump..where does the oil go that you pour in, the top end or directly into the sump? If anyone knows for a fact this is a problem, let me know. I suspect this happens all the time. Thanks.