VP C9 here (special order). I used to run 100LL, but C9 has a much better distillation curve/Reed vapor pressure for a 2 cycle. I used Champion WP-2 semi-synth 2t based on a number of reviews on various different sites. It's not really that well known from what I can tell. Give it a shot if you haven't, you can buy it online at various sites. Also have tried Lubegard's oil, I prefer Champion because its a much heavier visc (how much that really matters for my usage I have no idea honestly). Both of these oils have very low odor when burning.