I have long been using Brian's oil and gas treatment in my car and motorcycle. He does not have a shopping cart on his website as you must talk to him directly and give him the year, make and model of your vehicle. He formulates the oil mixture specifically for the vehicle. My buddy used his oil and gas treatment on his Screamin Eagle from new, broke down the motor at 40K still had the crosshatch. He also manufactures sodium free coolants; bottom line the guy knows his stuff, very knowledgeable.

http://bndautomotive.com/about/