Just an experience I had with Sta-Bil. Back in the 80's when I was living in Illinois I purchased a new Honda lawn mower. The old Toro I had was still in good shape so I spent the afternoon cleaning it all up, changed the oil and spark plug, then filled the tank with fresh gas and a healthy dose of Sta-Bil. I ran it long enough until I could smell the Sta-Bil in the exhaust. I then put it in the basement where it sat for over 6 years. When we were moving to Arizona I brought it out to sell it at a yard sale we were having, and it started on the very first pull! From that point on I've been a firm believer in Sta-Bil. Bill T.