We (Rob & I) put stabil in his boat every year after we winterize it and have never had a problem with bad gas in the spring, just as an added procaution we still always put a bottle of dry gas in first time out though. I put stabil in all of my stuff, Lawn Mower, D.R. Trimmer, Nephew's motorbike, and antique 3 wheeler and have never had bad gas come spring or summer I def. think it's worth what little money it costs Just my .02 Take Care God Bless and Good Hunting LOL Dave From up North