I don't see any reason to switch. In fact, at that mileage, synth is probably going to be better for your engine.
The tech is sorta right....you're not supposed to switch back and forth at random. If you're going to switch to dino oil, stick with it.
Anyway, yeah...Mobil 1 is awesome. OEM filters are good, I'm also incredibly happy with the NAPA Gold (Wix) filters.