[Water Warrior 2]

Doesn't look like much of a problem. That is likely the residue from shipping gunk they put on the bike.

Now that you have fresh oil you should glance at the level before every ride. Your GZ will likely use some oil but don't get too excited about it. Most do so just top it up and ride on. It really is a good habit to be in. Check all lights for proper function(including horn) and the tire pressure too.