What is the ratio for the gas/oil mix?
We recommend 20:1 for the first gallon for initial break-in of the engine. After that we recommend you run it at the same mix you would run a weed eater or chainsaw. That usually works out to 50:1. Not everyone is comfortable with that little amount of oil and you can most certainly run more if you want. We do not recommend going less than 50:1 unless it is using AMSOIL 100:1 oil. That oil is specifically formulated to mix at 100:1 but give the same lubricating potential as 50:1. There again, if you want to use more you can. Mix the AMSOIL at 50:1 and you get the equivalent of 25:1 in normal oil. I have a chart available for download in PDF format that specifies how much oil you should use to obtain various mix ratios. It covers ratios from 16:1 to 100:1 in gas quantities of 1 gallon to 5 gallons.