your math says you've been using these coils for almost 10 years ... how long have these been out?
HAH yeah, I should have explained better. I run 5 BVC coils at a time. 1 x p3, 3 x p2.5, 1 x VTR and I usually rotate them out in a weeks time but as I mentioned above I have done some tests and had outliers within that. For nic base, I find the flavor to be less bright after a week and if I have the coils to spare I will toss them every Sunday. My wife also runs 2 at a time but her favorite juices are super dark/thick/sugary and kills BVC coils in 5-7 days so usually we average 2 packs a week over a 1 year spread. The total count includes defective coils, ones with mispacked wick, DOA, etc.
Essentially, I have burned through a sh*t ton of BVC coils and they are my fav still. Although I wish I had used them for 10 years. I would have started vaping before I started smoking but that would have been a better thing to do