... You must think I'm pretty new to motorcycles if you figured I'd use car oil! ...
no, not at all
its important to keep in mind when questions are posted on a forum, the response may come from a person that has not been following all your posts
I try to keep responses general in nature, when someone searches the forum in the future looking for 'clutch slipping' or replacement, this thread will come up, so I try to cover all the bases
as we get to know each other better suggestions and comments will get more to the point, please dont take any overly simple comments personally
by far the most common questions posted here are resolved with cable adjustments, the proper oil, dont put the running bike in gear while the kickstand is down, adding carb cleaner to fuel after a bike has been parked for a while, and the fact that when a battery starts to fail the starter will spin a little bit slow, but the ECM will not fire the spark plugs and the bike will not start...
the usual complaint about the Vstar clutch is the lever is set up in a way that makes the friction zone very narrow. If a person rode a Honda 250 rebel for the MSF beginners course, then purchased a VS650, the difference is very pronounced. That might be part of the reason the clutch does not grab as hard, with the narrow friction zone it would be too easy to stall the bike taking off from a stop.
If you have not looked up the engine HP vs RPM curves yet, the peak HP on a stock 650 is at 55mph in 4th gear, and 70mph in 5th gear. Get out of the highway and have at it WFO at those shift points. The bike does not have a tach, so you cant see if the engine RPMs suddenly climb and the clutch is slipping, but you would hear it.