Having been commuting for 10 years as my only form of transportation i have noticed absolutely no difference in any kind of lube regarding chain durability.
I can get about 4000km of a an 8sp chain and 8sp cass. same with 9sp.
I have tried using industrial greases, molykote with oil, motor oil, chain specific industrial lubes, wurth teflon spray. And it all works within 10% of each other.
just spray on some crap and it will last as long as it will imo.