If you own a Moto Z in the Brazil and have enrolled to Motorola Feedback Network, you should have recieved a notification for Android 8.0 Oreo Software Update with build number OPL27.76-15.
Android 8.0 Oreo Soak Test for the Moto Z comes with numerous enhancements over Android Nougat, such as faster booting, new Settings and Quick-Settings UI, Picture in Picture (PIP), Adaptive icons, Autofill, Notification timeout, Motorola has also added several new features to the latest software update. Android 8.0 Oreo update for the Moto Z also brings the latest January 1st 2018 Security Patch, Stability and Camera improvements.
Assuming the test rolls out smoothly, those of us not in the test could see the update within a week or two. Once Motorola announces an official rollout of the update for all, we shall let you know. Stay tuned to our Facebook and Twitter page to get the first News.