Question is why would a business buy 87 octane fuel and blend it with 10% and sell it as 87 octane fuel? Geuess they wouldn't, but instead sell it as 91 octane fuel. That is why when I am not using E85 (when the pricing spread is wider) I use 91 octane mid grade E10. It is 87 gas with 10% ethanol. We have 87, 91, or 93 at the pump, along with E15, E20, and E85. Based on the information about the 87 E10, I opt for the 91 E10. Same price as ethanol free regular 87 in my area. The 93 premium is so outrageous in price that if I wanted or needed that much octane I could just pump 99 E85 for a dollar a gallon cheaper.
Another reason I use the 91 octane is that we have none of that top tier gas stuff that GM seems to like. I would either have to use an additive once in a while to keep things clean or just use better E10 and E85. E85 cleans better than the detergents in top tier. I would just prefer the junk sub par 83-84 octane gas not get into the vehicle. A lot of people take the ethanol is junk position. I take the sub 87 octane gas is junk position.
Another reason I use the 91 octane is that we have none of that top tier gas stuff that GM seems to like. I would either have to use an additive once in a while to keep things clean or just use better E10 and E85. E85 cleans better than the detergents in top tier. I would just prefer the junk sub par 83-84 octane gas not get into the vehicle. A lot of people take the ethanol is junk position. I take the sub 87 octane gas is junk position.