Thanks, but I live in the desert (just outside of Death Valley, typical humidity is single digits) so moisture should not be a problem here. And I keep my fuel in sealed containers in a shed that is kept just for my fuel. I suppose it could be bad fuel, but I buy my fuel 40 gallons at a time from a place that sells race gas and other high performance fuels, so I'm assuming it's good. Also I always add either Seafoam or Stabil to every 5 gallon container. My testing shows it's always been E85 or above. (as high as E90). (using Quick Fuel Technology test tube kit.)19k on a 2007?! Thought I was low miles (05 with 88k). I’m e85 tuned. Remember, e85 has a shorter shelf life than unleaded. Remember, it absorbs moisture faster. It seems you don’t drive the car a lot, like me with mine. If I let it sit for a while, I drain the fuel and refuel with fresh ethanol.
But I am considering draining and refueling. What is the best method for draining the tank in these cars?