I have been using coleman fuel for several yers now in two brisons and several zenoahs and one us 41 two flying friends have also , i use either the zenoah oil or amsoil sabre i also mix it at 3 ounces per gallon ,this ratio # came from baker himself at BME engines , i,m a delaership technician and i dont use gasoline due to the safety issues and no smell is a plus , i have read and heard so many stories about using coleman fuel that is not correct ,of course you must evaluate your engine also, a high performance engine with high compression and a lot of spark advance could cause detonation and engine damage but with engines llike the zenoah it works perfectly i have also broken in engines on gasoline and switched to coleman with no changes in rpm or carb adjustment my two cents worth and real world use of coleman fuel , if would damage my engines i wouldnt use it , all of the empty coleman fuel cans in the garage are a testament to the stuff