I use rotella synthetic, could'nt find it in Wally World so i bought a jug of Mobil 1. I swear the Bike seems quiter runs smoother and shifts easier. Or is my mind trying to justify paying 26 dollars a jug?

Of course it will run smoother, it's fresh oil and it has the friction additives which wet clutches like we have in the Valks do not like!

per Mobil ALL of their oil now has friction modifiers added. IMO, stick with the Diesel oils that don't have it in their formula yet! Thanks EPA
Your scooter, run what you want..........