Re: very bad gas mileage.
I honestly don't remember ever checking the fuel mileage on mine. I'm more into the 'smiles' per gallon mode.
BTW, I used 32:1 for break-in and have used 50:1 (Echo oil) for the past 2 1/2 years. When the tank is low, I add more fuel mix.
You're never lost until you run outa gas.