The XD100 is an Evinrude oil that is sold as the premium oil to use in their outboard oil injection systems. Newer Evinrudes with oil injection allow you to choose the amount of oil injected, and if you are using the XD100 oil, Evinrude says you can use it at 100:1. If using regular TC-W3 oil, you're supposed to switch the injection rate to 50:1.
When I looked at the bottle of this stuff, I don't see any certifications on it, BTW.