In case you neva know, HFN or Hawaii Fueling Network selling "ethanol free" gasoline at their Cardlock Fuel Stations, (Hilo) ( Shipman Industrial Park, for awhile) and if I'm not mistaken, it is midgrade fuel. They no longer pump super gas, have to Minit Stop for super. I do not know about rest of Hawaii Island or Maui, but good for people running fishing boats. I saw this a week back when I was filling gas in my work truck, I filled with ethanol free gasoline, truck seems to have more power. I consider getting personal cardlock from HFN, but gasoline sold there seems more expensive? One day went to WalMart and saw this Lucas Safeguard Ethanol Fuel treatment, I do not know if make difference, but tried it in my 1991 4x4 truck, find out later.