I've seen lots of suggestions at ECF threads about using some EJmix to disperse the oil. (You can read the ingredients at Amazon: blend of medical grade PEG400, PEG300, PEG200, and PG). Most say it's foul tasting, so add just a bit to the flavoring & shake it up. Then add your PG and shake. Let it all steep for a day or two before you add the VG. And PG50/VG50 may be too much VG. I have NOT tried this myself, so others will have some advice based on experience.
