Thanks guys. After both my HPI trucks wearing out soooo fast I started wondering if 1 or 2 gallons is the norm. I agree with the break in in method being part of the problem. The 6% oil just seemed to over rev so easily if leaned a hair too much. The fuel did have good power and a bit more run time. But I'm not racing and my 20% 16% castor oil fuel has plenty of power and so much more lean protection. I do still tune on safe side of peak. I thought something was wrong when my cold pinch was gone by 2 quarts on my last piston/sleeve. Now with about the same amount of fuel in I have nice cold pinch.