I use Motor Oil Saver to reduce start up smoke and consumption.
I have tried many oils and additives to reduce start up smoke and found that MoS2 Antifriction SAE 10W-40 and Motor Oil Saver did the best job at reducing the blue smoke at start up. Quit using MoS2 Antifriction SAE 10W-40 as it got too $$. I use it with Rotella T6 now. Used my last can of Motor Oil Saver, Napa doesn't stock it any more in Denver.
So yes, it works in my motor. 94 Land Cruiser 435,000 mi.