I have been running Rotela T Synthetic in my 1st Gen for the last 20k miles. There is a tiny leak that is really nothing more than an annoyance either comming from the stator or the transmission cover. Just enough to make a small wet spot under the kick stand but not ebough to ever have to add any oil between changes. I've changed the gasket on the transmission cover but that made no difference at all. I'm beginning to think it may simply be synthetic oil. I've heard different opinions but my question was, would it hurt anything to go to Rotela T standard oil? The bike runs great and I don't want to do anything to screw it up. As you can tell I'm no mechanic. Just wanted ya'lls advice.