Hi everyone and a Happy new year... Been using VIP Vapeing liquid for I think 4 or so years and have noticed a difference with my orders., which is once a month. I didn't know that they had changed the mix to 50/50 . Would like to know when the change took place.. Iv always found that some orders were stronger than others and the mixture was thicker with a darker color.. I always stick to strawberries and lime flavour so I'm in a good position to give my opinion and the 18mg strength is because if I use anything else the hit at the back of your throat is weaker.. But I would never use another brand, tried many, and never found any that stood up to VIP liquid .. So good on you VIP for the standard of Oils...... All the best Lisa Mcnally.. (from Walse)