I'm glad you brought up dry lubes because Sentry Solutions has a really good one that I've used for years now. It's called "BP 2000". It's much better than any graphite I've ever used or any of the teflon based dry lubes for that matter. I've heard that there has been a lot of progress made in the area of dry lubes and hope more people chime in with their favorite dry lubes. There also used to be a graphite/teflon combination dry lube that I used to get at my local ACE Hardware but they quit carrying it unfortunately. I do think that dry lubes are probably going to be the future for folding knives because they have made a lot
Oh yeah I'm fully aware of their engine treatment oils with the PTFE in them. However I've had better luck using the QMI products for that application. But Slick 50 did make an all purpose spray lube that came in a tall red can and it was called "Slick 50 One Lube" and I just loved it for all kinds of quick lube jobs>> it was 100 times better than WD-40. But it's also strange that I no longer see any of Slick 50's other products here locally anymore ( Kansas City, MO area). But I wouldn't doubt if the engine treatment would make a great overall lube either for that matter.
Now the reason I like Militec better for my folding knives is that it seems to cling to the blade longer than anything else I've used up till now. Again I've been also having decent results using Sentry Solutions "BP 2000" Dry Lube too.