I got five more flights on mine this weekend and finished up the first gallon of fuel... Lawn slushy 1:32. Going to switch over to synthetic next time out. What should I expect in the way of tuning when switching over to synthetic? This DL hass been running so good I almost hate to change things up. BUT... I am sure the switch over will be good all around. Its just a tad rich on the low end and I think the top end could be tweeked a bit also on the current fuel. Tachs 7100 top end and idles so slow that I have to throttle up landing the Ultimate.