Clutch upgrade

[superdude]

I've read every post on here about oil for the RX3 and finding neutral. Ive always been a big fan of Rotella's T diesel oils but my RX3 never quite found neutral very easy using it. My friend recently changed his oil in his RX3 and changed to the Rotella T diesel oil and his clutch and shifting went from ok to worse instantly. So that made me think I wanna try something else. I went and bought some Mobil Delvac 1300 same stuff Spud runs thinking this would cure everything with 800 miles on the bike but now the bike is even worse. I ran the bike to 1 bar on temp gauge in the garage while in neutral, and then shifted into first and the bike lurched forward and died with zero throttle applied. Wouldnt start again while in first gear because of all the pressure on the plates I assume but got into neutral started again and same thing when shifted into first. After warmed up more got better but definitely is a bigger problem than it was before. So my questions are this..

1) Assuming that my shift lever is tight and working good, and my clutch properly adjusted, should I switch oil again to something completely different or is there a bigger issue here?

2) Are bikes more finicky with brand new oil? Does the oil need to soak into the plates and "break in" with the motor before it starts running optimum? I think I've used 4 oils now in my bike in 800 miles. Stock oil it came with, valvoline, then the rotella, now the delvac.

3) Would getting a new set of clutch plates or a heavy duty barnett clutch
system fix these issues?

My main concern is the bike being so jerky when I shift into 1st from neutral (and dying on me), and not being able to find neutral at a stop like in my garage or parking lot when I need to. I saw people had some success switching to synthetic oil but didnt want to keep buying gallons of oil with no idea what the problem is.
Any info/experience/insight is helpful.