A 60-18 mix blended by Earnie Leflor of the Texas impba, It is good fuel I use it on my sport 40 with 7.5, my 20 and 40 seaduders with cmbs, and my 60 rigger with a k&b 11cc. All run fine, except for this engine, bought new a long time ago, and self destructs every 30 mins.