I think your stressing out over this a bit too much.
I just use the 99 cent auto parts store brand oil. They tell me it's just made by Valvoline and packaged in a different bottle. I change it often though. Original 25 year old clutch and NO problems what so ever.
1981 Honda ATC 185s
-DG Exhaust
-200x Carb
-Uni Filter
-Air filter box removed
-10T Front Sprocket
-Plastic fuel tank
-Aftermarket seat
-200s front forks/shocks
-Aftermarket 4 bolt rear wheels
-Tire chains when ice riding
1988 Ford Mustang LX 5.0L
-Wayyyy too much to list!!!