I probabley ran 1/2 of a gallon through it today. I am a little over 1 gallon breaking in. The engine is running much better every flight. I leaned out the low end alot today and transition got much better in the air. At the moment, if I pop the throttle from idle to WOT in the air the engine usually doesn't have much of a problem transitioning. But with a slow throttle transtion it has trouble getting to full throttle. I am going to conntinue to lean out the low end. BTW, richening it makes it worse. Hopefully the midrange will get better as it breaks in. My RPM's are still low however, it is turning right around 6700 peak on a xoar 22-8. Still haven't tried a new tach and the batteries were low on the tach i was using. That is around 25 pounds of thrust acording to my thrust calculator. Still pretty good for a 13.5 pound plane. I am hoping to maybe get in the 27-28 pounds of thrust range after it fully breaks in. Again, i don't have much fuel through her so.......