I also have been using the Endurance regualr formula and have had good success with it. Never had it sling on my Navigator, which is white, or my black Mustang. Easy to apply and seems to last a reasonable time.
It's all I use. I've seen some comments that it slings off the tires, but I have not had that problem at all. Everything else I used was very difficult to keep on the tires. Not so with Endurance -- at least for me. Maybe wiping it thinner is the trick.
Anyway, I like it a lot after trying 4-5 others previously.
I've had good luck with it. I apply with EO tire swipes, wait about 15 minutes, and wipe down thoroughly with a terry towel. On tires with lots of grooves, it will sling if not given enough time to dry or if it is not wiped down enough. It hasn't turned any of the tires I've applied it to brown and it does last for a good amount of time, even through rain or a few washings.