Help With Oil Capacity

This may seem like a dumb question, but does anyone know the oil capacity of the 2014 Triumph America?

Mine did not come with it's owners manual, and the web is not being super helpful. Some folks say 3.8 liters, some say 4.5 liters. The bike shop I got my tires at sold me 4 liters and I rode home to do the change, and realized there aren't any markings on the sight glass so I got curious.

 

Thank you!