I started off using 50/50 PG,VG but found I must be a bit PG intolerant ,So ive been using PG 20% VG 80% and that seems a better fit for me in my Inokkin clearomiser. The higher VG is thicker so Ive been diluting it with a bit of water. I seem to go through a tank faster now but ive offset that by buying MBVs 230 ml bottles for $29.00 plus postage so more like $ 36 .00 US still not too expensive. I really like their Maui sunrise and alternate occasionally with green apple .Ive tried their coffee flavour which is nice but find it bungs up my clearomiser quickly.