I have about a gal of WILDCAT ys20/20 run through my Saito 82a and see about 9100 when set 300 rpm rich of peak. I'm turning a 15X4W apc. I'm told the rpm will increase as I run a couple more gallons of fuel through it. It has increased about a 100 rpm from a half gallon to one gallon. Some others told me you shouldn't consider a saito broken in until about four gallons. This is my first four stroke so I rely heavily on what other modelers tell me.