Our small equipment business said to always use medium octane gas in small equipment. Unfortunately, Sandy, unless you live in Missouri or Montana, your premium gas has ethanol. We do have a choice here in Mississippi. I only go to a BP here that all the businesses use (including Mississippi State University). This fueling station has a bank of ethanol, diesel, and non-ethanol fuel pumps. I never choose the ethanol bank of fuel pumps. I use low octane in two vehicles, premium in my wife's auto, and the mid-grade for all my small equipment.