Also see : Android Oreo Features – Check Out What’s New
Armed with a decent-ish 2GB of RAM and moderate Snapdragon 410 processor, the Moto G3 is surely capable of running the Android 8.0 update. Note that it is an unofficial build and has some bugs,But in future it will be fixed.
Don’t miss : LineageOs 15 features and Supported device list
So if you want to test the latest version of Android then Download the below given zip file and flash it by using TWRP Recovery follow the below guide to install the Rom Gapps
Full guide : How to Install Custom ROM using TWRP Recovery!