We get a lot of people who come into the store asking us about High Vegetable Glycerine (VG) and High Propylene Glycol (PG) liquids.
High VG = More Vapour and thicker liquid
High PG = More throat hit and thinner liquid
50/50 ratio = Best of both worlds
The thing to remember when looking at High VG juices is can your coil handle it. Most coils under 0.5 ohm are ok with higher VG juices as they heat at a higher temperature which VG needs to vapourise. Any coil over a 0.5 we recommend would be more suited to a 60 VG / 40 PG ratio at the very maximum as the thicker liquids take more power and time to heat, which will burn out a higher ohm coil quicker.
On the flip side to this some people want more of a throat hit so we recommend no more than a 60 PG / 40VG ratio because if your liquid is too thin it can leak through the bottom of your tank (if it is bottom fill).