Originally Posted by megabites
Depends if you're using ethanol free or not. If you can purchase Ethanol free then yes top off to prevent moisture & condensation from spoiling your gas and always use stabil.
If you're NOT using the good stuff and putting Ethanol in your tank then DO NOT top off & always use stabil.
Ethanol absorbs water. Most gas is at least %10 ethanol. The more ethanol in your tank the more water it's absorbing.
You have a gas tank in a boat... so assume that it's getting water in the gas. Trust me no mater how hard I try I get water in the gas. Ethanol is killing my carb $$$ and I made the switch right before winterizing this year to go to completely ethanol free fuel.
Good luck and hope you can find the E Free stuff!
What you said about ethanol doesn't even make sense, Yes if you are running E-10 it absorbs water, thats right, but if you have only a 1/2 tank of gas there is also a 1/2 tank of air which = moisture to be absorbed by the ethanol.+ and + that 1/2 empty tank will sweat like a hooker in church. Your theory above is incorrect.
KEEP YOUR TANK FULL, AND USE MARINE GRADE STABILL, there are so many mag. articles and INTERNET discussions on this subject it will make your head spin.