The dominator suggested retail from AMSOIL site is $52.55 plus shipping for a gallon of 15/50. You can go to AMSOIL.com and see the prices for retail for any of their products. King KX sells to board members and I do not want to try to take business from him. He may even be giving a deal to members.
The first time you install it I would run it for about 3/4 of a tank of gas and then flush it. I have ran it as long as 10 tank fulls of gas in some vehicles but it depends on modifications, riding style, and temp. I have a 1997 Suzuki LT160 four stroke that I have ran this oil from day one of owning it. The outside of the quad looks like it has went through a war zone and I have never had to adjust the valves yet. The internals of the
Engine look brand new. It has always been the quad that everyone uses every trip. We have even pilled 5 people on it for the shower trips when we rode in San Felipe Mexico. LMAO