I have experienced the results of fueling a saw with 87 E10 and storing the saw for a year. So I used the listing of E free stations and started becoming educated on where E free stations are in my immediate area. I had a few stations around Huntsville, AL. I just moved to Athens,AL and sure enough there is a E free station about a mile from my house. All the others only had one pump E free. This station has all grades 92, 89, 87 E free.