My experiance and a few others on the forum has been that you will not get all 8.5 qts out. Its been reported that just under 8 qts. get removed. I can confirm this from my first oil change.

The reason I know this is that it took exactly 8 qts of new oil to re-fill it.

With that being said, I would still be prepared for a small bit of overflow just in case.

BTW, I drained my oil from the drain plug on the oil pan and not with a top-sider. Top-sider users have reported the same thing.

Hope that helps.

Good luck....