I've used many different brands and feel the Klotz Uplon is by far the best. One bottle will treat 2 55gal drums. Keeps your pumps, fuel lines, etc. lubricated and somewhat protected from the alky. Less prone to corrode. I get mine from Comet kart sales
Some vendors sell alky with or without lube so you need to verify. I prefer without so I can add my own.