Well Mobil makes some really good oils, the problem is that there are so many of them even in just the Mobil 1 line....
Just make sure it's for AIR COOLED two cycle engines. In case you've not seen it, here's a link to the manual and it lists this requirement under the "fuel" section.
As you can see, they don't mention a specific brand like RC Showcase does nor do they show the 32/1 ratio for breaking in the engine. The subject of which oil to use and in what concentration has been beat to death here on the forums and you may want to take a look at the gas engine forum for some of those threads regarding specific oils that guys like. Personally, I think if you follow the manufacturer's recommendations, it's pretty hard to go wrong.