I was always a big fan of Merc fluids, more so the gear lube, gimbal bearing grease etc. Even the corrosion guard spray. After decades of boating and doing my own service on a number of boats I owned, I still remember just a few years back, for the first time ever, I used a different gear lube, I got cheap, still called a marine gear lube, I bought it in the marine section maybe it was Pennzoil? I forgot, anyway I knew the moment was began pumping it in and the way it ran out that is wasnt the same as the Merc lube. I also noticed how easy it was to clean off my hands, the darn Merc stuff is impossible to get off easy like the other stuff. I did this part of my prewinter service, it stuck in my mind and I changed back to Merc during the boating season, Knowing it was different I couldnt go the whole boating season, to me it was a waste of money for the Pennzoil (yellow container) Merc advertises their lube is "tacky" in case of water intrusion it will better protect. I am now a believer. Simply because i have experienced it first hand. THe Merc is very tacky, the other brand was not. Does any of it matter? It mattered enough to me thats all I know. Boats are expensive enough, few extra bucks for the Merc I will never question again.