Which one do you use?

Have you tried others?

I got Biobor for under $20 to treat 640 gals, $14, $18, don't remember. Have used others on boats but can't recall a brand name.

The key to this is to keep the water out of the fuel.
No water = No life.

Glad to see you post something, you wouldn't believe the BS I read about you.

My current bottle is from PowerService, purchased at a farm supply store. I've learned that biocide is biocide, and they all work if the directions are followed. Make sure it's just biocide, not the "cure the world's problems fix-it-all-in-one-jug".

Even the best suppliers make mistakes and get water in their fuel. That's why I always use a water separater, downstream from the tank. Too much water in the vehicle tank means I do the biocide, siphon the tank, filter that fuel, drain the tank from the bottom plug, and fill again with the freshly filtered fuel.

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daBenz - 1970 220D