I found that my oil choice also made me get false nutrals and whether or not the temps in the engine were high.
I don't want this thread to get into an oil thread chest beating thread either....so use whatever oil you think is best for YOU!...I use Amesoil 10-40 full synthetic strictly, unless breaking in my engine, then I use simple dyno oil. It works for me.
Again, please don't start the oil arguement...thanks....just state what you use and move on if you will.
Thanks and hope this helps.