Pull the CVT cover off, and have a look see. No need to guess or speculate then. If you have a leak, you'll be able to find it, if your belt or clutch shoes are oil soaked, you'll see it, if the variator faces are worn, or the belt....basicly, every thing you've been curious about, will be there in front of you. If you're still unsure you can snap some pics, and post them, then there will be something, everyone can take hold of, and talk you through it...
