I've got about a gallon thru my DL. Still runs slightly rich. It seems I have to adjust the needles after every run. It burbles at mid range but is fine at low and high throttle. I checked today and with a Vess 22B I got 7100 rpm's WOT with 1700 at idle. This is with a Jtec wrap around pitts muffler. I've got mine on a PAU Extra 330 that weighs in at 15# 13oz. It's a rocket. I will hover at less than 1/4 throttle. The darn thing starts on the 3rd or 4th flip cold or hot. Seems to be a pretty good engine so far.