Won't effect the operation of the clutch. So long as the pressure plate is disengaged. Remembering that when it's spinning at whatever RPM and there is oil in there it's state will no doubt change.
This is sorted now. Being cheap, I used the wrong oil. And it stuck all my clutch plates together. After a clean and reassembly it was fine now running it on 5W40 oil. As per mechanic's recommendation. :)
All running nicely with no bad clutch problems now.
Okay interesting. I've ran all sorts inside my gearbox, from water to magnetic. I think I recall having similar problems with magnetic but I can't say It's done it any harm.
No harm was done. I was running it on that oil from when Norfe rebuilt it for 1,000-2,000 miles. Obviously with oil changes between but it was the same oil I used. It was 10W-40 car engine oil IIRC.
My clutch wasn't disengaging properly, it'd sit rolling forward and trying to stall with the clutch in etc. Now it's fine, can push it forward with the clutch in and it'd actually move freely rather than trying to start up. :)