yeah non ethanol fuel Steve,our octane ratings are based on some different scale than yours,we have in non ethanol 91 which I use in lawn equipment,95 I use in the honda or also 91,and 98 which I use in my car,it carries a high initial advance,if I use less itll ping under any sort of half decent load,we have E85 ethanol fuel available and some sort of blends like 95 with 10% ethanol.