Hi All, could anyone tell me what would the mix ration would be for a 12 gal tank? On the can it calls for 1oz. seafoam to 1 gallon of gas. Is it safe to use as an additive, while I'm out cruising or is this desinged to run on a seperate smaller gas tank, while on the muffs as a cleaner? Thanks for your help, Pfistey1