This is my second can of this clutch lube. The first can is not quite empty yet, and I've had it for over 15 years. I take apart my driven clutches (and I have several machines) every fall and clean them up, and always add a little of this lubricant to them before I put them back together. It never gums anything up, and I've gotten terrific life out of my clutches and their component parts. It is difficult to say how much is due to the lubricant, but for the very small cost, if it extends the life at all, it is more than worth using.