Can I add Sea Foam to a snowblower gas tank to clean varnish? [SOLVED]

Thanks for the question, Russel. Yes, you can add Sea Foam to that tank of gas. It is compatible with those other additives.

To clean up fuel varnish, you’ll want to add a high concentration of Sea Foam to the tank. You can use up to a 1:2 ratio of Sea Foam to gas. If you’ve got a gallon or more already in the tank, I’d add the whole 16 can. If less than a gallon, add up to half a can. After that, start the engine and let it idle for 10 or so minutes to allow the Sea Foam mixture to flow through the carburetor circuits, then shut off the engine.  Let the engine sit and allow it to soak overnight. Idle the engine for 5-10 minutes. Then, whenever you need it next, operate as normal. The Sea Foam will help clean up any varnish in the fuel system.

Hope that helps and let me know if you have any other questions!