[turbobill]

I've had nothing but bad experiences with so called preservation "additives". I never had a problem with the older gasoline sitting, especially over a short period of 6 months or less. One vehicle sat for 6 years without a problem. Started and ran fine and to this day, I've never cleaned the fuel system. This same vehicle sat for 9 years (years ago) in the south without a problem.

If I have to use ethanol based gas, I drain it if it's going to sit. I've also used 100LL aviation fuel for storage as it doesn't deteriorate over long periods. Now that ethanol free fuel is widely available, that's all I use.