Yeah, you'll want to do it yourself. The oil-change guys know how to do one thing, and only one thing.
You confuse them when you throw odd-ball variables like Fumoto valves and customer-supplied synthetic oil. Your best bet is to either do it yourself, or go for a walk and pretend that they're doing it right. Just don't be surprised if your Fumoto is gone the next time you try to change the oil, and the oil is still in your trunk.