I might have to try this... as my MPG have dropped! I was averaging about 18-19 when I first got my 8 and now I'm avg. 15-17MPG. I know I drive fairly hard, but I say not much different than before..
I'm going to pick up a gallon of 2cycle and give it a shot this weekend.
Lets all give this a try and report

I usually fill up my tank around 1/4 tank (160-190 Mile). Last night it took over 10 gallons fill to the top and I drove 155 miles.