I bought and use  this to put additives in my gas tanks to eliminate the destructive aspects of today's ethanol gasoline. If you are not using such an additive, you run the risk of ruining any rubber components in your fuel system not to mention other components. I am not a mechanic so please don't chastise me for any differences of opinion on these matters. I have had two engines ruined by ethanol gas that is sold at most fuel centers today. By the way there are several good fuel treatments on the market for this purpose so just do a little investigating and you will find them here on Amazon.com. Best wishes and God bless.