BND- what is the longevity and utility for your products in a vehicle that is not a daily driver, or performance oriented? I have a 95 Mustang GT convertible that only comes out a handful of times during the spring-fall weather. It has 29k miles on it. I currently use OEM products in it, though several years ago switched from using the Ford recommended blended oil to full synthetic.
My thought is that anything that provides added lubricity is a good thing, however the products needs sticking power to be able to last without circulating throughout as frequently as most would prefer. Cleaning the internal engine is less of a concern, but who would actually turn that down? Though, using the product like ACES IV at every fill up might not be possible long term.
I bring this up because a few years ago the transmission was acting up- having trouble shifting, the shifts were prolonged, stuttered, and overly harsh. Took it to the mechanic, who advised a flush. After a double flush, and some minor driving it was determined that the cause was torque converter chatter due to simply not allowing the fluids to circulate. It was believed that gravity had pulled the fluids down, and without driving the vehicle to recirculate them, they stayed, going to waste until I started the car and drove it which while did start to circulate the fluid, was still catching up on lubricating everything. I also got a quick lesson in how fluids work to absorb water regardless of if the car is running or not, and why all fluid changes are based on mileage and time duration.
That experience is now always in the back of my mind. Sure I start the car more often during the off months now. But anything that can assist in the long term protection is going to get my attention. You mentioned that your oils surpass SAE standards. I'd like to see if that is something I could take advantage of in a garage queen for the engine and trans.