Cheap *** rotella 15w-40 has the JASO stamp safe for wet clutches. It's what I use in my primary
me too. i also have the fm 107. changed out that stiffer clutch spring for the aim v92 vpc clutch. works as good or better and won't give you popeye arm (on left side only )
+1 Rotella T 15w-40 in the primary ($13/gal @ Walmart). Have also used Syn 3, Red Line Primary Oil, but like the Rotella as much, if not more, than higher dollar alternative products.