It'll vary from coil to coil, but generally speaking, 80 vg is about as high as I've been able to chain vape off of the Mini with the new coils. Ten consecutive 6-8 second lung hits with no dry hits is my benchmark for what a coil can handle. Keep in mind, max vg is considered by lots of vendors to be anything at or above 70% vg and might still contain pg. I'm not pg sensitive, but really don't care for the aftertaste, so I use pure vg and distilled water when I mix my juices. 100% vg thins to about a 70% vg consistency if you use about 5% distilled water in the pure vg mix (0.5 ml to 9.5 ml pure vg in a 10 ml mix). Make sure to use distilled water. It's pretty cheap at the supermarket and a gallon lasts ages.