[I only use it in my yard equipment, I buy five gallons, and add a bottle of Mechanic in a Bottle, (available at Walmart and Tractor Supply), which is a preservative for the gasoline to protect it during the long periods of non-use, like through the winter.]
Ethanol Shield from the same company is the preservative. MIB is a cleaning chemical for poor running engines. Use ES for storage. Available at Home Defect also.
Why use Ethanol Shield in gasoline that contains no ethanol?