[MIke L]

Originally Posted by chiphead

Ethanol provides a significant amount of the octane rating. It also evaporates, so as fuel sits, the octane rating drops as the ethanol and aromatics evaporate. It also eats sending unit floats, hoses, fuel pump diaphragms, and other components that don't like ethyl alcohol. Upgrade those components whenever using E-10 fuel.
I don't really pay attention to gas brands. There may be some difference to how a station blends motor octane and research octane to get the RON/MON, and the additives a certain brands uses. I find that Parkers gas runs better than Circle K, but that may be a local to me difference due to a dirty store tank or a local blender's fuel rack settings.

I use E10 93 when I drive it regularly, its the only 93 I can get here. The only downside is it failed my last fuel pump. For storage, I'll run the car dry, then use 90 octane straight gas when the car sits.

93 non-ethanol for storage or long periods of not driving, to avoid ethanol evaporation.

93 with 10% ethanol when the fuel is being regularly consumed and replenished.

Thank You Chiphead!
That’s what I needed as it can sit for a few weeks to a month at a time.

I appreciate it

Mike