I only use fuel additives for storage, not for every fill up. When I didn't use it after I sold the TS it got algae. With our heat and humidity in FL storing without fuel protection is asking for problems. I use to use
Diesel Fuel Additives - Stanadyne blue label, but my sources is out of business. I have used the additive at Walmart before and it's OK.
http://www.walmart.com/ip/Diesel-Fue...32-oz/16644698 HEET also makes water remover for diesels, also at Walmart. I have used that when I have had water in the fuel and it does works. It is in a red bottle not the yellow for gas.
I am going to ready the label closer, but it may work just fine for storage by taking the water out, which starts the algae.
I had a good friend (rest his sole) that was a "Million Mile Trucker", a real group, and he told me not to waste my money on additives except for storage.